12-week Multi-vitamin/Mineral Supplementation on Peri-menopause Symptoms, Cognition, Sleep, and Psychological Well-being.

Cognitive function - working memory task. Measured as a percentage, with a higher score indicating better performance.

Cognitive function - working memory task. Measured as reaction time (in milliseconds), with a lower score indicating better performance.

Cognitive function - working memory task. Measured as a percentage, with a higher score indicating better performance.

Cognitive function - working memory task. Measured as reaction time (in milliseconds), with a lower score indicating better performance.

Cognitive function - working memory task. Scored as level of difficulty reached (4 upwards), with a higher score indicating better performance.

Cognitive function - working memory task. Measured as a percentage, with a higher score indicating better performance.

Cognitive function - working memory task. Measured as reaction time (in milliseconds), with a lower score indicating better performance.

Cognitive function - episodic memory. Measured as a percentage, with a higher score indicating better performance.

Cognitive function - episodic memory task. Measured as reaction time (in milliseconds), with a lower score indicating better performance.

Cognitive function - episodic memory task. Measured as a percentage, with a higher score indicating better performance.

Cognitive function - episodic memory task. Measured as reaction time (in milliseconds), with a lower score indicating better performance.

Assesses the effect of menopausal symptoms on quality of life in four domains: vasomotor, psychosocial, physical, and sexual; as well as providing a total score. The questionnaire has 29 items, each item is a symptom of menopause, the participants rate each symptom between 0 (not at all bothered) to 6 (bothered all the time.) The vasomotor symptoms include items such as 'hot flushes' and 'sweating'; psychological symptoms include 'accomplishing less than I used to' and 'poor memory'; physical symptoms include 'difficulty sleeping' and 'weight gain'; sexual symptoms include 'vaginal dryness' and 'avoiding intimacy'. A conversion score is created for each of the 4 domains: vasomotor; psychosocial; physical; sexual; as well as a total score. Each score ranges from 1 -8, with higher scores indicating greater problems.

This is an established questionnaire used to measure symptoms associated with depression. The questionnaire has 20 items, including 'my sleep is restless', 'I felt depressed' and 'I felt lonely'. The participants rate the symptom on a scale between <1 day and 5 to 7 days, the 4 scale points are: Rarely or none of the time (less than 1 day); Some or a little of the time (1-2 days); Occasionally or a moderate amount of time (3-4 days); Most or all of the time (5-7 days). The possible range of scores is between 0 to 60, higher scores indicate more presence of symptomatology. The scoring of positive items is reversed.

The state-trait anxiety inventory will be used to measure anxiety levels, specifically trait anxiety. It consists of 20 items and the scale ranges from 1 to 4: 1 = almost never, 2 = sometimes, 3 = often and 4 = almost always. The nine positive items will be reversed for scoring, items 21, 23, 26, 27, 30, 33, 34, 36 and 39. The possible range of scores is 20 to 80, higher scores indicate higher levels of trait anxiety within the participant. Examples of items within the questionnaire include: 'I feel like a failure' and 'I feel secure'.

This established questionnaire will be used to measure the perception of stress. Each of the ten items are rated on a scale between 0 (never) to 4 (very often.) The five scale points are 0 = never, 1 = almost never, 2 = sometimes, 3 = fairly often, 4 = very often. The four positive items will be reversed for scoring, items 4, 5, 7 and 8. The questionnaire item examples include 'In the last month, how often have you been upset because of something that happened unexpectedly?' and 'In the last month, how often have you felt that you were unable to control the important things in your life?'. The possible range of scores is between 0 to 40, higher scores indicate high participant perceived stress.

This is a series of mood scales. Each scale is a line anchored at either side by an adjective describing a mood. Participants must click at a point on the scale that represents how they are feeling at that point in time. There are 18 scales in total, each scored out of 100. From these scales three composite scores are calculated describing feelings of 'Alertness', 'Stress' and 'Tranquillity', which are also presented as a score out of 100.

The PROMIS-SRI will be used to measure sleep related impairment. The questionnaire contains 8 items, and participants are required to answer in relation to their sleep within the past 7 days. Each item is rated on a scale from 1-5. The items are then summed to create a single value (range 8-40), with higher scores indicating higher levels of sleep disturbance. Examples of items within the questionnaire include: 'I felt alert when I woke up' and 'I had a hard time getting things done because I was sleepy'.

The PROMIS-SD will be used to measure sleep disturbance. The questionnaire contains 8 items, and participants are required to answer in relation to their sleep within the past 7 days. Each item is rated on a scale from 1-5. The items are then summed to create a single value (range 8-40), with higher scores indicating higher levels of sleep disturbance. Examples of items within the questionnaire include: 'my sleep was restless' and 'I had difficulty falling asleep'.