General information of cases and controls
| Variables | Cases (n=1004) | Controls (n=1025) | p Value |
|---|---|---|---|
| Age (years) | 61.0 (7.8) | 60.8 (7.4) | 0.539 |
| Educational level* (n, %) | 867 (86.4) | 887 (86.5) | 0.957† |
| Annual income‡ (Yuan, RMB) | 300 (0, 2000) | 500 (0, 2000) | 0.150§ |
| Monthly expenditure on food (Yuan, RMB) | 100 (50, 150) | 100 (50, 150) | 0.797§ |
| Food shortage experience¶ (n, %) | 452 (45.0) | 374 (36.5) | <0.001† |
| Physical activity time (h/day) | 9.9 (2.8) | 10.0 (2.7) | 0.315 |
*Educational level at primary school level and below.
†p Value by Mantel–Haenszel χ2 test.
‡The remaining money except for basic living expenditure, including money from their sons or daughter.
§p Value by median two-sample test.
¶Exposure to the Chinese famine (1959–1961) during childhood.