Prednisolone for 12 Versus 6 Months to Treat Pulmonary Sarcoidosis

Proportion of subjects with a relapse (worsening after 4 weeks of stopping treatment) or treatment failure (worsening during treatment or within 4 weeks of stopping treatment requiring an increase in the treatment intensity) in the study groups. Worsening is defined as persistent (≥2 weeks) worsening of cough and/or dyspnea, and one or more of the following: a) worsening of lung function (≥5-point reduction in percentage-predicted FVC or FEV1), or b) increase in the chest radiograph abnormalities due to sarcoidosis.

Proportion of subjects with good or fair treatment response between the study groups defined as:

Good response: Resolution (no symptoms attributable to sarcoidosis, a normal chest radiograph, and normal lung function with normal laboratory parameters related to the initial treatment-requiring indication) or improvement (improvement in respiratory symptoms with either (a) decrease in radiological abnormalities, or (b) a ≥5-point increase in the percentage-predicted FVC or FEV1 from the baseline, or (c) both, with no worsening on imaging or spirometry along with normal/stable laboratory parameters related to the initial treatment-requiring indication) with treatment.

Fair response: Stabilization (any reduction in symptoms along with stable radiological abnormalities, and less than a 5-point change in the percentage-predicted FVC and FEV1 along with normal/stable lab parameters) of disease during treatment.

Sarcoidosis health related quality of life will be assessed using the King's Sarcoidosis Questionnaire (KSQ). KSQ is a validated multidomain instrument used to assess QoL of patients with sarcoidosis. The domains include: general health (GH), lung, medication, skin and eyes. The questionnaire consists of 29 items (general health: 10, lung: 6, medication: 3, skin: 3, eyes: 7) that assess the disability that the symptoms in various domains have posed on the patient's day-to-day activities in the past week. Each item is rated on a 7-point Likert scale from 1 (all of the time) to 7 (none of the time). The KSQ module and overall (total) scores are finally transformed to a range of 0-100 [(actual score - lowest possible score/range) ×100], where higher scores represent better health status. A minimal clinically important difference (MCID) of 8 for the KSQ GH and of 4 for the KSQ lung have been proposed in a study of 271 subjects.

Mean change in forced vital capacity assessed using spirometry between the study groups. Spirometry will be performed according to the ATS/ERS guidelines using an ultrasonic flow sensor spirometer (NDD Medizintechnik AG, Zurich, Switzerland) and will be expressed in liters.

Proportion of subjects having glucocorticoid-related adverse effects will be recorded including weight gain, Cushingoid features, infections, skin thinning, ecchymosis, cataracts, increased intraocular pressure, hypertension, gastritis, osteoporosis, myopathy, mood disorder, psychosis, memory impairment, hyperglycemia, and others.

Mean time to relapse (worsening after 4 weeks of stopping treatment) or treatment failure (worsening during treatment or within 4 weeks of stopping treatment requiring an increase in the treatment intensity) in the study groups. Worsening is defined as persistent (≥2 weeks) worsening of cough and/or dyspnea, and one or more of the following: a) worsening of lung function (≥5-point reduction in percentage-predicted FVC or FEV1), or b) increase in the chest radiograph abnormalities due to sarcoidosis

Sarcoidosis-associated fatigue will be assessed using the Fatigue assessment scale (FAS). FAS is a questionnaire with ten items, with five ques¬tions for physical fatigue and five questions reflecting mental fatigue.25 The questionnaire is self-completed by patients and all question¬naire items are rated on a five-point Likert scale (1, never to 5, always). The response scores are sum¬mated to get a total score, which ranges from 10- 50. FAS scores ≥22 and ≥35 imply fatigue and severe fatigue respectively.26 A four-point change in FAS scores after treatment is considered clinically significant.