Table 1 Baseline characteristics of the total sample and the sample by the different trajectory groupsa
From: Body mass index and trajectories of the cognition among Chinese middle and old-aged adults
TRAJECTORY GROUP | |||||
|---|---|---|---|---|---|
CHARACTERISTIC | TOTAL SAMPLE (n = 5693) | RAPID DECLINE (n = 361) | SLOW DECLINE (n = 2101) | STABLE (3231) | Pb |
BMI Underweight (< 18.5) Normal (18.5–23.9) Overweight (24–27.9) Obesity (> = 28) Age | 211(3.71) 2540(44.62) 1596(27.93) 1352(23.75) | 28(7.76) 171(47.37) 83(22.99) 79(21.88) | 105(5.00) 1021(48.60) 564(26.84) 411(19.56) | 78(2.41) 1348(41.72) 943(29.19) 862(26.68) | < 0.001 |
mean(SD)c | 57.07(8.16) | 60.91(9.76) | 58.29(8.11) | 55.85(7.73) | < 0.001 |
45–54 | 2340(41.10) | 96(26.59) | 729(34.70) | 1515(46.89) | < 0.001 |
55–64 | 2303(40.45) | 148(41.00) | 890(42.36) | 1265(39.15) | |
65–74 | 901(15.83) | 77(21.33) | 420(19.99) | 404(12.50) | |
75–84 | 149(2.62) | 40(11.08) | 62(2.95) | 47(1.45) | |
Male | 3042(53.44) | 145(40.28) | 1075(51.17) | 1822(56.39) | < 0.001 |
Married | 5243(92.10) | 308(85.32) | 1918(91.29) | 3017(93.38) | < 0.001 |
Years of schooling | < 0.001 | ||||
0 | 612(10.75) | 143(39.61) | 371(17.66) | 98(3.03) | |
1–6 | 2465(43.30) | 151(41.83) | 1163(55.35) | 1151(35.62) | |
> = 7 | 2616(45.95) | 67(18.56) | 567(26.99) | 1982(61.34) | |
Medical insurance | 5410(95.0) | 337(93.35) | 1996(95.00) | 3077(95.23) | 0.295 |
Social activities | 2317(40.70) | 145(40.17) | 720(34.27) | 1452(44.92) | < 0.001 |
Chronic diseases | 0.052 | ||||
none | 1967(34.55) | 123(34.07) | 676(32.18) | 1168(36.15) | |
1–3 | 3317(58.26) | 215(59.56) | 1266(60.26) | 1836(56.82) | |
> 3 | 409(7.18) | 23(6.03) | 159(7.57) | 227(7.03) | |
Physical activities | 2519(44.25) | 161(44.60) | 880(41.88) | 1478(45.74) | 0.021 |
Sleeping time, mean(SD)c | 6.50(1.65) | 6.14(1.90) | 6.39(1.76) | 6.61(1.53) | < 0.001 |
MMSE score, mean(SD)c | 13.63(2.18) | 12.29(2.01) | 12.20(1.63) | 14.71(1.88) | < 0.001 |