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. 2018 May 16;13:947–956. doi: 10.2147/CIA.S157089

Table S1.

Variables for constructing frailty index in the 2002 and 2005 waves of the Chinese Longitudinal Healthy Longevity Survey

Number Variables Values
1 Feel useless with age Never =0; seldom =0.25; sometimes =0.5; often =0.75; always =1
2 Feel lonely and isolated Never =0; seldom =0.25; sometimes =0.5; often =0.75; always =1
3 Feel fearful or anxious Never =0; seldom =0.25; sometimes =0.5; often =0.75; always =1
4 Keep my belongings neat and clean Always =0; often =0.25; sometimes =0.5; seldom =0.75; never =1
5 Self-reported health Very good =0; good =0.25; so so =0.5; bad =0.75; very bad =1
6 Do you feel any change in your health since the last year? Much better =0; slightly better =0.25; almost the same =0.5; slightly worse =0.75; much worse =1
7 Make own decision Always =0; often =0.25; sometimes =0.5; seldom =0.75; never =1
8 Bathing Without assistance =0; partial assistance =0.5; need assistance =1
9 Dressing Without assistance =0; partial assistance =0.5; need assistance =1
10 Toileting Without assistance =0; partial assistance =0.5; need assistance =1
11 Transferring Without assistance =0; partial assistance =0.5; need assistance =1
12 Continence Without assistance =0; partial assistance =0.5; need assistance =1
13 Feeding Without assistance =0; partial assistance =0.5; need assistance =1
14 Able to go outside to visit neighbors? Yes =0; a little difficult =0.5; not able to do so =1
15 Able to go shopping by yourself? Yes =0; a little difficult =0.5; not able to do so =1
16 Able to make food by yourself? Yes =0; a little difficult =0.5; not able to do so =1
17 Able to wash clothes by yourself? Yes =0; a little difficult =0.5; not able to do so =1
18 Able to walk 1 km? Yes =0; a little difficult =0.5; not able to do so =1
19 Able to carry 5-kg weight? Yes =0; a little difficult =0.5; not able to do so =1
20 Able to crouch and stand for three times? Yes =0; a little difficult =0.5; not able to do so =1
21 Able to take public transport? Yes =0; a little difficult =0.5; not able to do so =1
22 Visual function Can see and distinguish the break in the circle =0; can see but not distinguish the break in the circle =0.33; cannot see =0.67; blind =1
23 Hand behind neck Both =0; right =0.5; left =0.5; neither =1
24 Hand behind lower back Both =0; right =0.5; left =0.5; neither =1
25 Raise arms upright Both =0; right =0.5; left =0.5; neither =1
26 Able to stand up from sitting in a chair Yes, without using hands =0; yes, using hands =0.5; no =1
27 Able to pick up a book from the floor Yes, without using hands =0; yes, using hands =0.5; no =1
28 Of times suffering from serious illness in the past 2 years Not applicable =0; one serious illness =1; two or more serious illnesses =2
29 Suffering from hypertension? No =0; yes =1
30 Suffering from diabetes? No =0; yes =1
31 Suffering from heart disease? No =0; yes =1
32 Suffering from stroke or cardiovascular disease? No =0; yes =1
33 Suffering from bronchitis, emphysema, pneumonia, and asthma? No =0; yes =1
34 Suffering from tuberculosis? No =0; yes =1
35 Suffering from cataract? No =0; yes =1
36 Suffering from cancer? No =0; yes =1
37 Suffering from glaucoma? No =0; yes =1
38 Suffering from gastric or duodenal ulcer? No =0; yes =1
39 Suffering from Parkinson’s disease? No =0; yes =1
40 Suffering from bedsore? No =0; yes =1
41 Suffering from arthritis? No =0; yes =1
42 Suffering from dementia? No =0; yes =1
43 Was interviewee able to hear? Yes, without hearing aid =0; yes, but needs hearing aid =0.33; partly, despite using hearing aid =0.67; no =1
44 The health of interviewee rated by interviewer by interviewer Surprisingly healthy =0; relatively healthy =0.33; moderately ill =0.67; very ill =1