Characteristic of patients with amyotrophic lateral sclerosis in 21 provinces in urban China during 2012–2016
| Characteristic | Total | Male | Female | P value |
| No | 7134 | 4481 | 2641 | |
| Age (years) | <0.001 | |||
| Mean (SD) | 54.37* (13.15) | 54.99 (12.87) | 53.34 (13.55) | |
| Age group, n (%) | <0.001 | |||
| 18–29 | 333 (4.67) | 182 (4.06) | 150 (5.68) | |
| 30–34 | 224 (3.14) | 117 (2.61) | 106 (4.01) | |
| 35–39 | 377 (5.28) | 236 (5.27) | 140 (5.30) | |
| 40–44 | 651 (9.13) | 387 (8.64) | 263 (9.96) | |
| 45–49 | 957 (13.41) | 567 (12.65) | 389 (14.73) | |
| 50–54 | 833 (11.68) | 539 (12.03) | 290 (10.98) | |
| 55–59 | 1134 (15.90) | 719 (16.05) | 415 (15.71) | |
| 60–64 | 990 (13.88) | 667 (14.89) | 322 (12.19) | |
| 65–69 | 761 (10.67) | 504 (11.25) | 256 (9.69) | |
| 70–74 | 505 (7.08) | 336 (7.50) | 169 (6.40) | |
| 75–79 | 266 (3.73) | 164 (3.66) | 102 (3.86) | |
| 80–84 | 81 (1.14) | 47 (1.05) | 34 (1.29) | |
| ≥85 | 21 (0.29) | 16 (0.36) | 5 (0.19) | |
| Year, n (%) | 0.558 | |||
| 2012 | 722 (10.12) | 459 (10.24) | 254 (9.62) | |
| 2013 | 1179 (16.53) | 754 (16.83) | 424 (16.05) | |
| 2014 | 1503 (21.07) | 940 (20.98) | 563 (21.32) | |
| 2015 | 1540 (21.59) | 977 (21.80) | 561 (21.24) | |
| 2016 | 2190 (30.70) | 1351 (30.15) | 839 (31.77) | |
| Area, n (%) | 0.848 | |||
| East | 3632 (50.91) | 2307 (51.48) | 1323 (50.09) | |
| North | 179 (2.51) | 106 (2.37) | 65 (2.46) | |
| Northeast | 718 (10.06) | 445 (9.93) | 272 (10.30) | |
| Northwest | 105 (1.47) | 68 (1.52) | 37 (1.40) | |
| Southcentral | 23.45 (88.41) | 23.05 (88.35) | 24.20 (88.45) | |
| Southwest | 827 (11.59) | 522 (11.65) | 305 (11.55) |
A total of 12 patients had missing information on sex. The areas are defined as in table 1.
*This was the age on 1 January 2012.