Variable | Total (N = 1021) | Han (n = 352) | Tibetan (n = 307) | Yi (n = 362) |  p-value | ||||
---|---|---|---|---|---|---|---|---|---|
 | N / Mean | (%) / (SD) | n / Mean | (%) / (SD) | n / Mean | (%) / (SD) | n / Mean | (%) / (SD) |  |
Child characteristics | |||||||||
 Gender | 0.941 | ||||||||
  Female | 491 | (48.1%) | 169 | (48.0%) | 150 | (48.9%) | 172 | (47.5%) |  |
  Male | 530 | (51.9%) | 183 | (52.0%) | 157 | (51.1%) | 190 | (52.5%) |  |
Age (months) | 18.9 | (5.8) | 19.36 | (5.6) | 18.59 | (5.9) | 18.72 | (5.9) | 0.474 |
Health status | 4.4 | (0.8) | 4.18 | (0.7) | 4.49 | (0.8) | 4.54 | (0.7) | 0.156 |
Caregiver characteristics | |||||||||
 Gender | 0.059 | ||||||||
  Female | 912 | (89.3%) | 324 | (92.0%) | 265 | (86.3%) | 323 | (89.2%) |  |
  Male | 109 | (10.7%) | 28 | (8.0%) | 42 | (13.70%) | 39 | (10.8%) |  |
Age (years) | 35.9 | (12.9) | 39.3 | (13.5) | 35.9 | (12.9) | 32.6 | (11.3) | 0.003 |
Educational background | < 0.001 | ||||||||
  Never went to school | 476 | (46.6%) | 40 | (11.4%) | 153 | (49.8%) | 283 | (78.2%) |  |
  Did not complete elementary school | 117 | (11.5%) | 54 | (15.3%) | 36 | (11.7%) | 27 | (7.5%) |  |
  Completed elementary school | 132 | (12.9%) | 51 | (14.5%) | 46 | (15.0%) | 35 | (9.7%) |  |
  Completed primary school | 170 | (16.7%) | 129 | (36.7%) | 31 | (10.1%) | 10 | (2.8%) |  |
  Completed high school or above | 126 | (12.3%) | 78 | (22.2%) | 41 | (13.4%) | 7 | (1.9%) |  |
Occupation | < 0.001 | ||||||||
  Farmer | 418 | (40.9%) | 45 | (12.8%) | 84 | (27.4%) | 289 | (79.9%) |  |
  Full-time stay-at-home parent | 466 | (45.6%) | 256 | (72.7%) | 157 | (51.1%) | 53 | (14.6%) |  |
  Other | 137 | (13.5%) | 51 | (14.5%) | 66 | (21.5%) | 20 | (5.5%) |  |
Annual household income (AHI) | < 0.001 | ||||||||
   < RMB 1.2 k | 326 | (31.9%) | 14 | (3.9%) | 48 | (15.6%) | 264 | (72.9%) |  |
   ~ RMB 1.2 k | 305 | (29.9%) | 84 | (23.9%) | 143 | (46.6%) | 78 | (21.6%) |  |
   ~ RMB 3.5 k | 146 | (14.3%) | 70 | (19.9%) | 64 | (20.9%) | 12 | (3.3%) |  |
   ≥ RMB 5 k | 244 | (23.9%) | 184 | (52.3%) | 52 | (16.9%) | 8 | (2.2%) |  |