Skip to main content

Table 1 Descriptive statistics for eligible individuals at baseline

From: Sex-specific associations between lipids and cognitive decline in the middle-aged and elderly: a cohort study of Chinese adults

Characteristics Overall, N = 6792 Male, n = 3494 Female, n = 3298 P value
Age, mean (SD) 58.30 (8.89) 59.26 (8.95) 57.28 (8.71) < 0.001
In married, n (%) 6137 (90.36) 3246 (92.90) 2891 (87.66) < 0.001
Urban, n (%) 2740 (40.34) 1327 (37.98) 1413 (42.84) < 0.001
Education, n (%)
 Illiterate 1364 (20.08) 313 (8.96) 1051 (31.87) < 0.001
 Primary school 2887 (42.51) 1608 (46.02) 1279 (38.78)
 Middle school and above 2541 (37.41) 1573 (45.02) 968 (29.35)
Smoking, n (%)
 Never 3915 (57.65) 874 (25.01) 3041 (92.24) < 0.001
 Former 1175 (17.30) 1035 (29.63) 140 (4.24)
 Current 1701 (25.05) 1585 (45.36) 116 (3.52)
Alcohol use, n (%)
 Never 4026 (59.28) 1194 (34.17) 2832 (85.87) < 0.001
 Former 399 (5.87) 329 (9.42) 70 (2.12)
 Current 2367 (34.85) 1971 (56.41) 396 (12.01)
Lipid-lowering medication using, n (%) 161 (1.71) 57 (1.69) 59 (1.73) 0.900
Health insurance, n (%) a 6438 (94.96) 3329 (95.39) 3109 (94.50) 0.095
Socially active, n (%)
 None 3925 (57.79) 2049 (58.64) 1876 (56.88) 0.314
 Inactive 1893 (27.87) 949 (27.16) 944 (28.63)
 Active 974 (14.34) 496 (14.20) 478 (14.49)
Body mass index (kg/m2), n (%) b
 < 18.5 345 (5.21) 194 (5.71) 151 (4.69) < 0.001
 18.5~23.9 3378 (51.06) 1950 (57.37) 1428 (44.39)
 24.0~27.9 2080 (31.44) 952 (28.01) 1128 (35.06)
 > 28.0 813 (12.29) 303 (8.91) 510 (15.86)  
Diabetes, n (%) 931 (13.72) 478 (13.69) 453 (13.75) 0.947
Hypertension, n (%) 2717 (40.00) 1355 (38.78) 1362 (41.30) 0.034
Total cholesterol (mg/dl), mean (SD) 192.57 (38.19) 188.25 (38.31) 197.17 (37.52) < 0.001
 < 200, n (%) 4081 (61.13) 2258 (65.62) 1823 (56.35) < 0.001
 200~239, n (%) 1891 (28.33) 882 (25.63) 1009 (31.19)
 240+, n (%) 704 (10.54) 301 (8.75) 403 (12.46)
LDL-c (mg/dl), mean (SD) 116.57 (34.58) 113.04 (34.38) 120.31 (34.39) < 0.001
 < 100, n (%) 2152 (32.26) 1242 (36.14) 910 (28.15) < 0.001
 100~129, n (%) 2392 (35.86) 1221 (35.53) 1171 (36.22)
 130~159, n (%) 1448 (21.72) 695 (20.22) 753 (23.29)
 160~189, n (%) 501 (7.51) 195 (5.67) 306 (9.46)  
 190+, n (%) 177 (2.65) 84 (2.44) 93 (2.88)
HDL-c (mg/dl), mean (SD) 50.69 (14.71) 50.35 (15.56) 51.04 (13.73) 0.054
 < 40, n (%) 1643 (24.60) 948 (27.54) 695 (21.48) < 0.001
 40~59, n (%) 3505 (52.48) 1713 (49.75) 1792 (55.38)
 60+, n (%) 1531 (22.92) 782 (22.71) 749 (23.14)
Triglycerides (mg/dl), mean (SD) 128.79 (83.87) 124.33 (83.88) 133.52 (83.61) < 0.001
 < 150, n (%) 4908 (73.70) 2605 (75.93) 2303 (71.34) < 0.001
 150~199, n (%) 842 (12.65) 382 (11.13) 460 (14.25)
 200+, n (%) 909 (13.65) 444 (12.94) 465 (14.41)
  1. LDL-c low-density lipoprotein cholesterol, HDL-c high-density lipoprotein cholesterol
  2. a12 missing
  3. b176 missing