Table 2.
Characteristics of participants by cognitive function among 2,000 Chinese elderly
| Variable | Normal cognition (n=1370) | Cognitive impairment (n=630) | Total | P value |
|---|---|---|---|---|
| Age (year) ‡ | 81.7 (11.2) | 94.6 (9.2) | 85.8 (12.0) | <0.01 |
| Gender† | <0.01 | |||
| Male | 767 (56.0) | 167 (26.5) | 1066 (53.3) | |
| Female | 603 (44.0) | 463 (73.5) | 934 (46.7) | |
| Marital status† | <0.01 | |||
| Currently married | 727 (58.1) | 106 (17.0) | 833 (41.9) | |
| Not married | 817 (40.9) | 519 (83.0) | 1154 (58.8) | |
| Education† | <0.01 | |||
| Illiteracy | 656 (47.9) | 527 (16.4) | 1183 (59.2) | |
| Literacy | 714 (52.1) | 103 (83.7) | 817 (40.9) | |
| Current cigarette smoking† | 290 (21.2) | 48 (7.6) | 338 (16.9) | <0.01 |
| Current alcohol drinking† | 245 (18.0) | 46 (7.3) | 291 (14.6) | <0.01 |
| Bad sleep quality† | 499 (36.5) | 275 (43.7) | 774 (38.7) | <0.01 |
| Central obesity† | 568 (41.5) | 194 (30.8) | 762 (38.1) | <0.01 |
| Anemia † | 686 (50.1) | 369 (58.6) | 1055 (52.8) | <0.01 |
| Type 2 diabetes † | 201 (14.7) | 102 (16.2) | 303 (15.2) | 0.38 |
| Hypertension† | 745 (54.4) | 323 (51.3) | 1068 (53.4) | 0.20 |
| CKD† | 367 (26.8) | 240 (38.1) | 607 (30.4) | <0.01 |
| TC(mmol/L) ‡ | 4.37 (0.98) | 4.13 (0.98) | 4.30 (0.98) | <0.01 |
| TG (mmol/L) ‡ | 1.04 (0.70) | 0.90 (0.49) | 1.00 (0.65) | <0.01 |
| LDL-C (mmol/L) ‡ | 2.59 (0.82) | 2.45 (0.82) | 2.55 (0.82) | <0.01 |
| HDL-C (mmol/L) ‡ | 1.29 (0.37) | 1.26 (0.35) | 1.28 (0.36) | 0.21 |
| MMSE (point) ‡ | 28.5 (1.7) | 14.8 (7.1) | 24.2 (7.6) | <0.01 |
TC =Total cholesterol; TG=triglycerides, LDL-C =low density lipoprotein cholesterol; HDL-C=high density lipoprotein cholesterol; CKD=chronic kidney disease; MMSE=Mini-Mental Status Examination.
†
Dichotomous variables (n, %) were tested using chi-square tests.
‡
Continuous variables (mean, SD) were tested for differences between the two groups using Student’s t or Cochran-Cox tests.