Table 1 Schedule of assessments with details on location, personnel, and frequency
Instrument name | Details | Baseline | Year 1 | Year 2 | Year 3 | |
|---|---|---|---|---|---|---|
1 | Personal and demographic information questionnaire | It includes age/gender, level of education, marital status, and income | ✓ | |||
2 | World Health Organization Quality of Life Brief Version (WHOQOL-BREF) [27] | It has 26 items and covers four domains of quality of life: a) physical health, b) psychological well-being, c) social relationships, and d) environment | ✓ | ✓ | ✓ | ✓ |
3 | Indian Vision Function Questionnaire [28] | It has 20 questions covering visual functioning and mobility domains | ✓ | ✓ | ✓ | ✓ |
4 | Patient Health Questionnaire (PHQ9) for depression [29] | It has nine questions with scores of 0–3 points per question, for a total score of 0–27 points | ✓ | ✓ | ✓ | ✓ |
5 | Social Networking Index questionnaire [24] | It has 12 questions that assess the number of high-contact roles (network diversity), number of people in social networks, and embedded networks | ✓ | ✓ | ✓ | ✓ |
6 | International Physical Activity Questionnaire (IPAQ) Short form [30] | It has 7 questions and measures a 7-day recall of physical activities | ✓ | ✓ | ✓ | ✓ |
7 | Risk factors (alcohol consumption and smoking) | Includes questions on present and past smoking and alcohol consumption | ✓ | ✓ | ✓ | ✓ |
8 | Hindi Mini mental State Examination (HMSE) [19] | It is a 22 questions-based scale with a maximum score of 31 | ✓ | |||
9 | Ocular history and systemic health questionnaire | It includes questions on previous surgeries, use of spectacles, and duration of use. Systemic health questionnaire includes information on hypertension, diabetes and other non-communicable diseases | ✓ | ✓ | ✓ | ✓ |
10 | Longitudinal Aging Study in India–Diagnostic Assessment of Dementia; LASI-DAD cognitive test battery [25, 26] | It covers the key cognitive domains: memory, attention/speed, orientation, language function, visuospatial skills, executive function, numerical ability, and retrieval fluency | ✓ | ✓ | ✓ | ✓ |
11 | Client Service Receipt Inventory for healthcare costs [32] | This collects information on the whole range of services, including estimating the costs of service receipt | ✓ | ✓ | ✓ | ✓ |
12 | Clinical Falls Risk Assessment: Quick screen questionnaire [31] | It assesses five factors related to falls: history of falls in the last 12 months, regular use of four or more medications, vision, peripheral sensation, balance, time reaction, and lower limb strength | ✓ | ✓ | ✓ | ✓ |