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NCT Number: NCT03454646

Comparison of Therapeutic Strategies With Cholinesterase Inhibitors (SOS TRIAL)

Cholinesterase inhibitors (CI) remain the only drugs with a recognized efficacy in mild to moderate Alzheimer's disease (AD) in spite of enormous research efforts. However, these drugs presented as "symptomatic treatment" of AD are considered as having only a weak effect on the course of AD. The reimbursement of these drugs is regularly challenged due to the lack of evidence for the impact of these drugs on milestones stages of AD evolution (survival without severe dementia, restriction in Basic Activities of Daily Living - BADL) and on major consequences in public health (hospitalization and institutionalization). The great majority of previous randomized controlled trials conducted with CI have had a too short duration and the end points were limited to cognition (ADAS Cog scale), IADL (Instrumental Activities of Daily Living) function and Global Impression of Change. New evidences from the DOMINO trial (1) conducted in UK, independently of the pharmaceutical industry, showed that the true effect of CI might be more to avoid or to delay the cognitive or functional decline in AD than to improve patients; the institutionalisation (2) was also delayed. However, this trial was conducted in patients with moderate to severe AD, and the interest of the drugs at the mild to moderate stage remains questionable.

The investigators have shown that a good surrogate marker of survival without severe dementia would be an increase of ADAS Cog scale of more than six points (3). A post hoc reanalysis of the pivotal RCT with two CI showed that in mild to moderate patients, CI was associated with a 15% decrease of patients with a deterioration of ADAS-Cog of more than six points in six months. Thus at the beginning of dementia the real effect of CI might be more of delaying the cognitive and functional decline, than to improve the patients. The main objective of the SOS trial is to demonstrate that the benefit of CI at the early phase of dementia is the same as at the later phase.

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Key information

Conditions

Alzheimer Disease Brain Diseases Central Nervous System Diseases Cholinesterase Inhibitors Dementia Mental Disorders Nervous System Diseases Neurocognitive Disorders Neurodegenerative Diseases Tauopathies

Age range

50 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

CHU d'Amiens Centre Mémoire Ressources Recherche, Amiens, France

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • New case of AD referring to a CMRR or MC.
  • Diagnosis of probable or possible AD, defined according to the NINCDS-ARDRA criteria
  • Mild to moderate stage, defined by a MMSE score above 15 at the time of pre-inclusion
  • Patients with indication to CI treatment
  • Patients Naïve to CI treatment
  • Patients aged 50 years or more
  • Menopause or effective contraception (for women)
  • Affiliated person or beneficiary of a social security scheme
  • Patients with AD LTI (Long Term Illeness)
  • Patients agree to participate, with free, informed and written consent signed by the patient and his caregiver

Non Inclusion Criteria:

  • Patients diagnosed with Lewy bodies disease, fronto-temporal dementia, or dementia from a cause other than Alzheimer Disease
  • More severe stage of the disease, defined by a MMSE equal or below 15 at the time of inclusion
  • Patients with contraindication to CI treatment
  • Patients residing in an institution at the time of pré-inclusion or randomization
  • Patients with a complete dependency for bathing and dressing at the time of pré-inclusion or randomization ( ADL de Katz, score 2/2 for the item "bathing" and/or "dressing")
  • Patients under tutorship or curatorship, patients unable to express consent
  • Patients with unstable severe general disease compromising the follow-up
  • Patients without caregiver
  • Patients included in another pharmacological trial
  • Pregnant or breastfeeding women

Exclusion criteria

  • CI responder patients for whom the MMSE score remained stable or became higher after 6 months of treatment
  • Patients with complete dependency for bathing and dressing at the randomization visit
  • Patients residing in an institution at the randomization visit

Treatment and study plan

cholinesterase inhibitors (CI) (donepezil, galantamine or rivastigmine)

Drug

The choice of the treatment will be done by the specialist according to his habits; the specialist will monitor the treatment as usual. All the recruited patients will be treated by CI according to the recommendations of the French HAS and the clinician's habits to choose the type of CI and adjust the dosage. After a 6-month period under CI treatment, patients will be classified according to the evolution of the Mini Mental State Examination (MMSE) as "non-responders" or responders.

Responders patients will continue their treatment according to the habits of the clinician. Non-responder patients will be included in the RCT, with individual randomization in two groups: one group who stops the CI, one group who continues the CI. All randomized patients will then be followed-up for two years with regular assessment of judgment criteria every 6 months.

Primary outcomes

  1. The primary outcome is a combination of complete BADL dependency in bathing and dressing and/or institutionalization or death at 2 years after randomization.

    Time frame: at 30 months after patient's inclusion

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

    For dependency in bathing and dressing, although it could be considered as less objective, we choose a level of total dependency, easy to assess with very low risk of misinterpretation.

Secondary outcomes

  1. BADL dependency will be evaluated by the clinician using the BADL scale from Katz [17].

    Time frame: at inclusion

    Each of the components of the combined primary outcome, as defined above, analyzed separately.

    As previously demonstrated, bathing and dressing are the first ADL losses, also defined by Katz et al. as the thresholds of disability [17] [18]. A total limitation in bathing and dressing will be considered (each item is coded from 0 - no limitation, to 2 - total limitation).

  2. BADL dependency will be evaluated by the clinician using the BADL scale from Katz [17].

    Time frame: at 6 months

    Each of the components of the combined primary outcome, as defined above, analyzed separately.

    As previously demonstrated, bathing and dressing are the first ADL losses, also defined by Katz et al. as the thresholds of disability [17] [18]. A total limitation in bathing and dressing will be considered (each item is coded from 0 - no limitation, to 2 - total limitation).

  3. BADL dependency will be evaluated by the clinician using the BADL scale from Katz [17].

    Time frame: at 12 months

    Each of the components of the combined primary outcome, as defined above, analyzed separately As previously demonstrated, bathing and dressing are the first ADL losses, also defined by Katz et al. as the thresholds of disability [17] [18]. A total limitation in bathing and dressing will be considered (each item is coded from 0 - no limitation, to 2 - total limitation).

  4. BADL dependency will be evaluated by the clinician using the BADL scale from Katz [17].

    Time frame: at 18 months

    Each of the components of the combined primary outcome, as defined above, analyzed separately As previously demonstrated, bathing and dressing are the first ADL losses, also defined by Katz et al. as the thresholds of disability [17] [18]. A total limitation in bathing and dressing will be considered (each item is coded from 0 - no limitation, to 2 - total limitation).

  5. BADL dependency will be evaluated by the clinician using the BADL scale from Katz [17].

    Time frame: at 24 months

    Each of the components of the combined primary outcome, as defined above, analyzed separately As previously demonstrated, bathing and dressing are the first ADL losses, also defined by Katz et al. as the thresholds of disability [17] [18]. A total limitation in bathing and dressing will be considered (each item is coded from 0 - no limitation, to 2 - total limitation).

  6. BADL dependency will be evaluated by the clinician using the BADL scale from Katz [17].

    Time frame: at 30 months

    Each of the components of the combined primary outcome, as defined above, analyzed separately As previously demonstrated, bathing and dressing are the first ADL losses, also defined by Katz et al. as the thresholds of disability [17] [18]. A total limitation in bathing and dressing will be considered (each item is coded from 0 - no limitation, to 2 - total limitation).

  7. Combination of complete BADL dependency in bathing and dressing and/or institutionalization or death

    Time frame: at inclusion

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

    For dependency in bathing and dressing, although it could be considered as less objective, we choose a level of total dependency, easy to assess with very low risk of misinterpretation.

  8. Combination of complete BADL dependency in bathing and dressing and/or institutionalization or death

    Time frame: at 6 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

    For dependency in bathing and dressing, although it could be considered as less objective, we choose a level of total dependency, easy to assess with very low risk of misinterpretation.

  9. Combination of complete BADL dependency in bathing and dressing and/or institutionalization or death

    Time frame: at 12 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

    For dependency in bathing and dressing, although it could be considered as less objective, we choose a level of total dependency, easy to assess with very low risk of misinterpretation.

  10. Combination of complete BADL dependency in bathing and dressing and/or institutionalization or death

    Time frame: at 18 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

    For dependency in bathing and dressing, although it could be considered as less objective, we choose a level of total dependency, easy to assess with very low risk of misinterpretation.

  11. Combination of complete BADL dependency in bathing and dressing and/or institutionalization or death

    Time frame: at 24 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

    For dependency in bathing and dressing, although it could be considered as less objective, we choose a level of total dependency, easy to assess with very low risk of misinterpretation.

  12. Combination of complete BADL dependency in bathing and dressing and/or institutionalization or death

    Time frame: at 30 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

    For dependency in bathing and dressing, although it could be considered as less objective, we choose a level of total dependency, easy to assess with very low risk of misinterpretation.

  13. Institutionalization with date of entry

    Time frame: at inclusion

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

  14. Institutionalization with date of entry

    Time frame: at 6 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

  15. Institutionalization with date of entry

    Time frame: at 12 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

  16. Institutionalization with date of entry

    Time frame: at 18 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

  17. Institutionalization with date of entry

    Time frame: at 24 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

  18. Institutionalization with date of entry

    Time frame: at 30 months

    Institutionalization with date of entry will be assessed by specialist at each follow-up time every 6 months. For patients not coming to the memory consultation, caregiver (formal and/or informal) and/or the general practitioner will be systematically contacted to obtain the information.

  19. Death and date of death

    Time frame: at inclusion

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

  20. Death and date of death

    Time frame: at 6 months

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

  21. Death and date of death

    Time frame: at 12 months

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

  22. Death and date of death

    Time frame: at 18 months

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

  23. Death and date of death

    Time frame: at 24 months

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

  24. Death and date of death

    Time frame: at 30 months

    Death and date of death will be assessed by contacting proxy or general practitioner. In case of lack of information the birth City Hall will be contacted to assess the vital status.

  25. the ADL scale

    Time frame: at inclusion

    ADL DE KATZ BATHING :└-┘/2 0 bathes self completely

    • needs help in bathing only one part of the body
    • needs help with bathing more than one part of the body or not bathed DRESSING :└-┘ /2

    0 gets clothes and gets completely dressed without assistance

    1 gets clothes and gets dressed without assistance, except for assistance in tying shoes 2 receives assistance in getting clothes or in getting dressed, or stays partly or completely undressed TOILETING :└-┘/2 0 toileting without assistance (may use cane, walker, or wheelchair)

    1 receives assistance 2 doesn't go to room termed " toilet ". TRANSFER:└-┘/2 0 transfer without assistance (may be using cane or walker)

    • transfer with assistance
    • doesn't get out of bed. FEEDING :└-┘/2

    0 feeding without help

    • need help cutting meat or buttering bread
    • needs total help or requires parenteral feeding. TOTAL : └-┴-┘/10 If the patient has a result of 2 at bathing and or dressing he can't be included at T0.

  26. the ADL scale

    Time frame: at 6 months

    ADL DE KATZ BATHING :└-┘/2 0 bathes self completely

    • needs help in bathing only one part of the body
    • needs help with bathing more than one part of the body or not bathed DRESSING :└-┘ /2

    0 gets clothes and gets completely dressed without assistance

    1 gets clothes and gets dressed without assistance, except for assistance in tying shoes 2 receives assistance in getting clothes or in getting dressed, or stays partly or completely undressed TOILETING :└-┘/2 0 toileting without assistance (may use cane, walker, or wheelchair)

    1 receives assistance 2 doesn't go to room termed " toilet ". TRANSFER:└-┘/2 0 transfer without assistance (may be using cane or walker)

    • transfer with assistance
    • doesn't get out of bed. FEEDING :└-┘/2

    0 feeding without help

    • need help cutting meat or buttering bread
    • needs total help or requires parenteral feeding. TOTAL : └-┴-┘/10 If the patient has a result of 2 at bathing and or dressing he can't be randomized at T6M

  27. the ADL scale

    Time frame: at 12 months

    ADL DE KATZ BATHING :└-┘/2 0 bathes self completely

    • needs help in bathing only one part of the body
    • needs help with bathing more than one part of the body or not bathed DRESSING :└-┘ /2

    0 gets clothes and gets completely dressed without assistance

    1 gets clothes and gets dressed without assistance, except for assistance in tying shoes 2 receives assistance in getting clothes or in getting dressed, or stays partly or completely undressed TOILETING :└-┘/2 0 toileting without assistance (may use cane, walker, or wheelchair)

    1 receives assistance 2 doesn't go to room termed " toilet ". TRANSFER:└-┘/2 0 transfer without assistance (may be using cane or walker)

    • transfer with assistance
    • doesn't get out of bed. FEEDING :└-┘/2

    0 feeding without help

    • need help cutting meat or buttering bread
    • needs total help or requires parenteral feeding. TOTAL : └-┴-┘/10

  28. the ADL scale

    Time frame: at 18 months

    ADL DE KATZ BATHING :└-┘/2 0 bathes self completely

    • needs help in bathing only one part of the body
    • needs help with bathing more than one part of the body or not bathed DRESSING :└-┘ /2

    0 gets clothes and gets completely dressed without assistance

    1 gets clothes and gets dressed without assistance, except for assistance in tying shoes 2 receives assistance in getting clothes or in getting dressed, or stays partly or completely undressed TOILETING :└-┘/2 0 toileting without assistance (may use cane, walker, or wheelchair)

    1 receives assistance 2 doesn't go to room termed " toilet ". TRANSFER:└-┘/2 0 transfer without assistance (may be using cane or walker)

    • transfer with assistance
    • doesn't get out of bed. FEEDING :└-┘/2

    0 feeding without help

    • need help cutting meat or buttering bread
    • needs total help or requires parenteral feeding. TOTAL : └-┴-┘/10

  29. the ADL scale

    Time frame: at 24 months

    ADL DE KATZ BATHING :└-┘/2 0 bathes self completely

    • needs help in bathing only one part of the body
    • needs help with bathing more than one part of the body or not bathed DRESSING :└-┘ /2

    0 gets clothes and gets completely dressed without assistance

    1 gets clothes and gets dressed without assistance, except for assistance in tying shoes 2 receives assistance in getting clothes or in getting dressed, or stays partly or completely undressed TOILETING :└-┘/2 0 toileting without assistance (may use cane, walker, or wheelchair)

    1 receives assistance 2 doesn't go to room termed " toilet ". TRANSFER:└-┘/2 0 transfer without assistance (may be using cane or walker)

    • transfer with assistance
    • doesn't get out of bed. FEEDING :└-┘/2

    0 feeding without help

    • need help cutting meat or buttering bread
    • needs total help or requires parenteral feeding. TOTAL : └-┴-┘/10

  30. the ADL scale

    Time frame: at 30 months

    ADL DE KATZ BATHING :└-┘/2 0 bathes self completely

    • needs help in bathing only one part of the body
    • needs help with bathing more than one part of the body or not bathed DRESSING :└-┘ /2

    0 gets clothes and gets completely dressed without assistance

    1 gets clothes and gets dressed without assistance, except for assistance in tying shoes 2 receives assistance in getting clothes or in getting dressed, or stays partly or completely undressed TOILETING :└-┘/2 0 toileting without assistance (may use cane, walker, or wheelchair)

    1 receives assistance 2 doesn't go to room termed " toilet ". TRANSFER:└-┘/2 0 transfer without assistance (may be using cane or walker)

    • transfer with assistance
    • doesn't get out of bed. FEEDING :└-┘/2

    0 feeding without help

    • need help cutting meat or buttering bread
    • needs total help or requires parenteral feeding. TOTAL : └-┴-┘/10

  31. the MMSE score

    Time frame: at inclusion

    The MMSE score will be assessed by the clinician, the psychologist or the speech therapist according to the habits of the center, using the French version of the MMSE (GRECO version)

  32. the MMSE score

    Time frame: at 6 months

    The MMSE score will be assessed by the clinician, the psychologist or the speech therapist according to the habits of the center, using the French version of the MMSE (GRECO version)

  33. the MMSE score

    Time frame: at 12 months

    The MMSE score will be assessed by the clinician, the psychologist or the speech therapist according to the habits of the center, using the French version of the MMSE (GRECO version)

  34. the MMSE score

    Time frame: at 18 months

    The MMSE score will be assessed by the clinician, the psychologist or the speech therapist according to the habits of the center, using the French version of the MMSE (GRECO version)

  35. the MMSE score

    Time frame: at 24 months

    The MMSE score will be assessed by the clinician, the psychologist or the speech therapist according to the habits of the center, using the French version of the MMSE (GRECO version)

  36. the MMSE score

    Time frame: at 30 months

    The MMSE score will be assessed by the clinician, the psychologist or the speech therapist according to the habits of the center, using the French version of the MMSE (GRECO version)

  37. the number of hospitalizations

    Time frame: at inclusion

    The number of hospitalizations will be assessed using standardized questionnaire, with date (month/year) and duration of hospitalization;

  38. the number of hospitalizations

    Time frame: at 6 months

    The number of hospitalizations will be assessed using standardized questionnaire, with date (month/year) and duration of hospitalization;

  39. the number of hospitalizations

    Time frame: at 12 months

    The number of hospitalizations will be assessed using standardized questionnaire, with date (month/year) and duration of hospitalization;

  40. the number of hospitalizations

    Time frame: at 18 months

    The number of hospitalizations will be assessed using standardized questionnaire, with date (month/year) and duration of hospitalization;

  41. the number of hospitalizations

    Time frame: at 24 months

    The number of hospitalizations will be assessed using standardized questionnaire, with date (month/year) and duration of hospitalization;

  42. the number of hospitalizations

    Time frame: at 30 months

    The number of hospitalizations will be assessed using standardized questionnaire, with date (month/year) and duration of hospitalization;

  43. Pharmacologie treatments consumed by the patient

    Time frame: at inclusion

    All the pharmacologie treatments consumed by the patient will be assessed, allowing to assess psychotropic drug consumption.

  44. Pharmacologie treatments consumed by the patient

    Time frame: at 6 months

    All the pharmacologie treatments consumed by the patient will be assessed, allowing to assess psychotropic drug consumption.

  45. Pharmacologie treatments consumed by the patient

    Time frame: at 12 months

    All the pharmacologie treatments consumed by the patient will be assessed, allowing to assess psychotropic drug consumption.

  46. Pharmacologie treatments consumed by the patient

    Time frame: at 18 months

    All the pharmacologie treatments consumed by the patient will be assessed, allowing to assess psychotropic drug consumption.

  47. Pharmacologie treatments consumed by the patient

    Time frame: at 24 months

    All the pharmacologie treatments consumed by the patient will be assessed, allowing to assess psychotropic drug consumption.

  48. Pharmacologie treatments consumed by the patient

    Time frame: at 30 months

    All the pharmacologie treatments consumed by the patient will be assessed, allowing to assess psychotropic drug consumption.

Study contacts

Contact information is provided by the study sponsor or research team.

François TISON, M.D., Ph.D

CONTACT

[email protected]

05 57 82 12 54

Jean-François DARTIGUES, M.D., Ph.D

CONTACT

[email protected]

05 57 82 01 16

Sponsors and collaborators

Lead sponsor

University Hospital, Bordeaux

Other

Registry information

Official study title

Comparison of Therapeutic Strategies With Cholinesterase Inhibitors: Stop or Still (SOS) Trial

Important dates

Study start
2024
Primary completion
2027
Study completion
2027
First posted
Mar 6, 2018
Registry last updated
Oct 6, 2023

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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