Table 1.
Characteristics of 7,144 Chinese elderly by cognitive status, 2011
| Factors* | Normal cognition n=4393 |
Cognitive impairment n=2751 |
Total n=7144 |
P-value |
|---|---|---|---|---|
| MMSE | 26.8(2.3) | 9.2(6.7) | 21.1(10.9) | <0.0001 |
| Age (year) | 83.3(9.7) | 93.2(9.7) | 87.1(10.9) | <0.0001 |
| Gender | ||||
| Male | 2335(46.9) | 900(32.7) | 3235(45.3) | <0.0001 |
| Female | 2058(53.1) | 1851(67.3) | 3909(54.7) | |
| Residence | ||||
| Urban | 2226(59.8) | 1464(53.2) | 4430(57.2) | <0.0001 |
| Rural | 1787(40.2) | 1287(46.8) | 3054(42.8) | |
| Education (year) | 3.2(3.0) | 1.1(2.5) | 2.4(3.6) | <0.0001 |
| Physically active | 2100(48.0) | 671(24.5) | 2771(39.0) | <0.0001 |
| Good visual function | 3749(85.3) | 1577(57.3) | 5326(74.6) | <0.0001 |
| Central obesity | 2198(50.0) | 1102(40.1) | 3300(46.2) | <0.0001 |
| Diabetes mellitus | 248(5.9) | 92(3.7) | 340(5.1) | <0.0001 |
| Cardiovascular diseases | 653(15.5) | 324(12.8) | 977(14.5) | 0.0024 |
| Stroke and cerebrovascular diseases | 332(7.9) | 265(10.4) | 597(8.8) | 0.0004 |
| Systolic blood pressure (mmHg) | 135.7(19.4) | 135.2(22.0) | 135.5(20.4) | 0.3055 |
| Diastolic blood pressure (mmHg) | 80.3(11.2) | 79.8(12.9) | 80.1(11.9) | 0.1302 |
| Pulse pressure (mmHg) | 55.4(15.9) | 55.4(17.5) | 55.4(16.6) | 0.8600 |
| Mean arterial pressure(mmHg) | 98.8(12.3) | 98.3(14.3) | 98.6(13.1) | 0.1494 |
| Hypertension | 1859(42.3) | 1162(42.2) | 3021(42.3) | 0.9481 |
*
Dichotomous variables listed as n (%), including gender, current smoking practice, alcohol drinking habits, central obesity, diabetes, cardiovascular diseases, stroke and cerebrovascular diseases, hypertension, were compared between two cognitive status groups using Chi-square tests; Continuous variables listed as mean (standard deviation), including age, education, SBP, DBP, PP, MAP, were comparted between two groups using Student’s T tests or Cochran-Cox tests. MMSE, Mini Mental State Examination.