Characteristic for patients with moyamoya disease in 22 provinces in urban China during 2013–2016
| Characteristic | Total | Male | Female | P value |
| No | 1987 | 884 | 988 | |
| Age, years | ||||
| Mean (SD) | 44.45 (14.30) | 44.22 (14.85) | 44.66 (13.80) | 0.509* |
| Age group, n (%) | ||||
| 0–9 | 49 (2.47) | 25 (2.83) | 24 (2.43) | 0.072† |
| 10–19 | 60 (3.02) | 38 (4.30) | 22 (2.23) | |
| 20–29 | 142 (7.15) | 65 (7.35) | 77 (7.79) | |
| 30–39 | 344 (17.31) | 163 (18.44) | 181 (18.32) | |
| 40–49 | 597 (30.05) | 272 (30.77) | 325 (32.89) | |
| 50–59 | 431 (21.69) | 193 (21.83) | 238 (24.09) | |
| 60–69 | 183 (9.21) | 91 (10.29) | 92 (9.31) | |
| 70–79 | 57 (2.87) | 35 (3.96) | 22 (2.23) | |
| ≥80 | 7 (0.35) | 2 (0.23) | 5 (0.51) | |
| Year of first diagnosis, n (%) | ||||
| 2013 | 248 (12.48) | 119 (13.46) | 114 (11.54) | 0.065† |
| 2014 | 386 (19.43) | 184 (20.81) | 184 (18.62) | |
| 2015 | 494 (24.86) | 225 (25.45) | 232 (23.48) | |
| 2016 | 859 (43.23) | 356 (40.27) | 458 (46.36) | |
| Region,‡ n (%) | ||||
| East | 859 (43.23) | 351 (39.71) | 457 (46.26) | 0.040† |
| North | 37 (1.86) | 16 (1.81) | 21 (2.13) | |
| Northast | 151 (7.60) | 80 (9.05) | 64 (6.48) | |
| Northwest | 61 (3.07) | 27 (3.05) | 33 (3.34) | |
| Southcentral | 707 (35.58) | 321 (36.31) | 331 (33.50) | |
| Southwest | 172 (8.66) | 89 (10.07) | 82 (8.30) |
117 patients had missing data for age, 115 patients had missing data for gender.
*Student’s t-test.
†χ2 test.
‡East area included Jiangsu, Zhejiang, Anhui and Shandong provinces; North area included Shanxi and Inner Mongolia provinces; North-East area included Liaoning, Jilin and Heilongjiang provinces; North-West area included Shaanxi, Gansu, Qinghai and Xinjiang provinces; South-Central area included Henan, Hubei, Hunan, Guangdong, Guangxi and Hainan provinces; South-West area included Chongqing, Guizhou and Yunnan provinces.