Table 2.
Baseline characteristics of the risk and control groups in the elderly (age ≥ 65)
| Variables | Categories | Unadjusted data | Propensity-matched data | ||||
|---|---|---|---|---|---|---|---|
| Control (n = 758), M ± SD, n (%) | At risk (n = 1933), M ± SD, n (%) | p | Control (n = 715), M ± SD, n (%) | At risk (n = 715), M ± SD, n (%) | p | ||
| Age | 71.09 ± 0.182 | 72.78 ± 0.16 | < .001 | 71.32 ± 0.19 | 71.18 ± 0.22 | .623 | |
| Sex | Male | 355 (45.0) | 771 (39.4) | .017 | 327 (43.9) | 360 (49.7) | .050 |
| Female | 403 (55.0) | 1162 (60.6) | 388 (56.1) | 355 (50.3) | |||
| Education level | ≤ Middle school | 522 (67.7) | 1418 (71.9) | .070 | 495 (68.1) | 490 (69.0) | .763 |
| ≥ High school | 236 (32.3) | 515 (28.1) | 220 (31.9) | 225 (31.0) | |||
| Household income | Middle-low | 524 (67.6) | 1472 (75.4) | .001 | 497 (68.1) | 493 (68.7) | .817 |
| Middle-high | 234 (32.4) | 461 (24.6) | 218 (31.9) | 222 (31.3) | |||
| Marital status | Married | 754 (99.5) | 1916 (99.1) | .217 | 711 (99.5) | 710 (99.3) | .595 |
| Single/others | 4 (.5) | 17 (.9) | 4 (.5) | 5 (.7) | |||
| Family history of CVD | No | 537 (69.9) | 1069 (53.8) | < .001 | 495 (68.2) | 498 (68.3) | .973 |
| Yes | 221(30.1) | 864 (46.2) | 220 (31.8) | 217 (31.7) | |||
| Living area | Urban | 586 (82.1) | 1462 (79.2) | .138 | 160 (17.9) | 183 (21.8) | .077 |
| Rural | 172 (17.9) | 471 (20.8) | 555 (82.1) | 532 (78.2) | |||
| Employment | None/housewife | 451 (59.2) | 1339 (71.8) | < .001 | 438 (61.0) | 452 (66.5) | .057 |
| Employed | 307 (40.8) | 594 (28.2) | 277 (39.0) | 263 (33.5) | |||
| Smoking | Never/ex-smoker | 701 (91.8) | 1787 (92.6) | .550 | 665 (92.7) | 645 (90.6) | .198 |
| Current smoker | 57 (8.2) | 146 (7.4) | 50 (7.3) | 70 (9.4) | |||
| BMI | < 25 kg/m2 | 556 (75.3) | 1096 (57.0) | < .001 | 514 (73.9) | 485 (68.5) | .069 |
| ≥ 25 kg/m2 | 202 (24.7) | 837 (43.0) | 201 (26.1) | 230 (31.5) | |||
CVD cardiovascular disease, BMI body mass index