Table 1.
Characteristics of the subjects before sampling
| Variable | Before sampling | After sampling | ||||||
|---|---|---|---|---|---|---|---|---|
|
Overall N = 14 130 |
Non‐sarcopenia N = 11 336 |
Moderate sarcopenia N = 1682 |
Severe sarcopenia N = 1112 |
Overall N = 11 387 |
Non‐sarcopenia N = 9096 |
Moderate sarcopenia N = 1407 |
Severe sarcopenia N = 884 |
|
| Age, years (SD) | 60.8 (9.3) | 58.7 (8.4) | 67.0 (7.8) | 72.4 (8.0) | 60.6 (9.5) | 58.5 (8.5) | 67.1 (7.8) | 72.7 (8.0) |
| Gender | ||||||||
| Male | 6756 | 5399 | 813 | 544 | 5330 | 4218 | 685 | 427 |
| Female | 7374 | 5937 | 869 | 568 | 6057 | 4878 | 722 | 457 |
| Education | ||||||||
| Illiterate | 3667 | 2524 | 612 | 531 | 3014 | 2054 | 526 | 434 |
| Can read and write | 2597 | 1963 | 386 | 248 | 2107 | 1602 | 308 | 197 |
| Primary school | 3201 | 2568 | 412 | 221 | 2566 | 2054 | 347 | 165 |
| Junior middle school | 2978 | 2706 | 193 | 79 | 2385 | 2164 | 159 | 62 |
| High school and above | 1687 | 1575 | 79 | 33 | 1315 | 1222 | 67 | 26 |
| Marital status | ||||||||
| Married | 11 727 | 9677 | 1285 | 765 | 8985 | 7429 | 1016 | 540 |
| Divorced | 742 | 631 | 67 | 44 | 741 | 639 | 61 | 41 |
| Widowed | 1560 | 967 | 311 | 282 | 1560 | 967 | 311 | 282 |
| Never married | 101 | 61 | 19 | 21 | 101 | 61 | 19 | 21 |
| Residence | ||||||||
| Urban | 8824 | 6738 | 1238 | 848 | 7190 | 5484 | 1032 | 674 |
| Rural | 5306 | 4598 | 444 | 264 | 4197 | 3612 | 375 | 210 |
| BMI | ||||||||
| 18.5–23.9 | 7016 | 4916 | 1327 | 773 | 5707 | 3985 | 1097 | 625 |
| <18.5 | 874 | 199 | 346 | 329 | 718 | 165 | 302 | 251 |
| 24–27.9 | 4502 | 4483 | 9 | 10 | 3563 | 3547 | 8 | 8 |
| ≥28 | 1738 | 1738 | 0 | 0 | 1399 | 1399 | 0 | 0 |
| Socio‐economic group | ||||||||
| Quartile 1 (lowest) | 3272 | 2312 | 538 | 422 | 2585 | 1783 | 468 | 334 |
| Quartile 2 | 3386 | 2696 | 427 | 263 | 2596 | 2063 | 342 | 191 |
| Quartile 3 | 3513 | 2952 | 358 | 203 | 2841 | 2382 | 291 | 168 |
| Quartile 4 | 3959 | 3376 | 359 | 224 | 3365 | 2868 | 306 | 191 |
| Health insurance | ||||||||
| No insurance | 938 | 738 | 103 | 97 | 747 | 585 | 90 | 72 |
| UEBMI | 1537 | 1372 | 111 | 54 | 1190 | 1050 | 95 | 45 |
| URRMI | 11 188 | 8844 | 1412 | 932 | 9076 | 7160 | 1173 | 743 |
| Govern insurance | 299 | 245 | 38 | 16 | 242 | 199 | 31 | 12 |
| Other insurances | 168 | 137 | 18 | 13 | 132 | 102 | 18 | 12 |
| Smoking | 6187 | 4850 | 814 | 523 | 4878 | 3791 | 680 | 407 |
| Drinking | 3719 | 3012 | 449 | 258 | 2957 | 2370 | 392 | 195 |
BMI, body mass index; SD, standard deviation; UEBMI, urban employee basic medical insurance; URRMI, urban–rural resident medical insurance.