Table 1.
Demographic characteristics of the study population.
| Overall | No AF | AF | p value | |
|---|---|---|---|---|
| 114039 (100%) | 111435 (97·7%) | 2604 (2·3%) | ||
| Sex | ||||
| Men | 54608 (47·9%) | 53195 (47·7%) | 1413 (54·3%) | <0·001 |
| Women | 59431 (52·1%) | 58240 (52·3%) | 1191 (45·7%) | ·· |
| Age (years) | ||||
| Mean | 55 (17) | 54 (17) | 65 (14) | <0·001 |
| 18-29 | 10750 (9·4%) | 10704 (9·6%) | 46 (1·8%) | <0·001 |
| 30-39 | 14852 (13·0%) | 14722 (13·2%) | 130 (5·0%) | ·· |
| 40-49 | 15972 (14·0%) | 15776 (14·2%) | 196 (7·5%) | ·· |
| 50-59 | 22399 (19·6%) | 21983 (19·7%) | 416 (16·0%) | ·· |
| 60-69 | 25516 (22·4%) | 24800 (22·2%) | 716 (27·5%) | ·· |
| 70-79 | 18311 (16·1%) | 17582 (15·8%) | 729 (28·0%) | ·· |
| ≥80 | 6239 (5·5%) | 5868 (5·3%) | 371 (14·2%) | ·· |
| Residence location | ||||
| Urban | 72837 (63·9%) | 71071 (63·8%) | 1766 (67·8%) | <0·001 |
| Rural | 41202 (36·1%) | 40364 (36·2%) | 838 (32·2%) | ·· |
| Geographical region | ||||
| East | 60192 (52·8%) | 58934 (52·9%) | 1258 (48·3%) | <0·001 |
| Central | 36113 (31·7%) | 35207 (31·6%) | 906 (34·8%) | ·· |
| West | 17734 (15·5%) | 17294 (15·5%) | 440 (16·9%) | ·· |
| Education attainment | ||||
| Primary school or less | 67878 (59·5%) | 66114 (59·3%) | 1764 (67·7%) | <0·001 |
| Middle and High school | 24409 (21·4%) | 23881 (21·4%) | 528 (20·3%) | ·· |
| College and higher | 21752 (19·1%) | 21440 (19·3%) | 312 (12·0%) | ·· |
| Ethnic Group | ||||
| Han | 108848 (95·4%) | 106359(95.4%) | 2489 (95·6%) | 0.771 |
| Non-Han | 5191 (4·6%) | 5076 (4·6%) | 115 (4·4%) | ·· |
| Marital status | ||||
| Married | 101571 (89·1%) | 99205 (89·0%) | 2366 (90·9%) | 0·003 |
| Widowed, divorced, single, or other | 12468 (10·9%) | 12230 (11·0%) | 238 (9·1%) | ·· |
| Current smoker | 12583 (11·0%) | 12278 (11·0%) | 305 (11·7%) | 0·268 |
| Current drinker | 9628 (8·4%) | 9381 (8·4%) | 247 (9·5%) | 0·053 |
| Obesity (BMI≥28 kg/m2) | 10969 (9·6%) | 10676 (9·6%) | 293 (11·3%) | 0·004 |
| Medical History | ||||
| HTN | 29859 (26·2%) | 28824 (25·9%) | 1035 (39·7%) | <0·001 |
| DM | 11151 (9·8%) | 10688 (9·6%) | 463 (17·8%) | <0·001 |
| Hyperlipidaemia | 11270 (9·9%) | 10833 (9·7%) | 437 (16·8%) | <0·001 |
| CHD | 8982 (7·9%) | 8390 (7·5%) | 592 (22·7%) | <0·001 |
| CHF | 2756 (2·4%) | 2364 (2·1%) | 392 (15·1%) | <0·001 |
| Valvular heart disease | 1137 (1·0%) | 998 (0·9%) | 139 (5·3%) | <0·001 |
| TIA/stroke | 3339 (2·9%) | 3088 (2·8%) | 251 (9·6%) | <0·001 |
Data are reported as n (%) or mean (SD).
AF=atrial fibrillation, BMI=body mass index, CHD=coronary heart disease, CHF=chronic heart failure, DM= diabetes mellitus, HTN=hypertension, TIA=transient ischaemic attack.