Research Article
A Case-Control Study of the Factors Associated with Anemia in Chinese Children Aged 3–7 years Old
Table 1
Baseline characteristics of children.
| | | Cases (n, %) | Control (n, %) | Total (n, %) | | Sex | | Male | 307 (55.62) | 307 (55.62) | 614 (55.62) | | Female | 245 (44.38) | 245 (44.38) | 490 (44.38) | | Age of children (years) | 5.19 ± 0.80 | 5.21 ± 0.79 | 5.20 ± 0.80 |
| | Ethnicity of children | | Han | 513 (92.93) | 529 (95.83) | 1042 (94.38) | | Minorities | 39 (7.07) | 23 (4.17) | 62 (5.62) | | Ethnicity of mothers | | Han | 508 (92.03) | 527 (95.47) | 1035 (93.75) | | Minorities | 44 (7.97) | 25 (4.53) | 69 (6.25) | | Age of mothers (years) | 32.77 ± 4.26 | 32.42 ± 4.73 | 32.60 ± 4.50 |
| | Mothers’ education | | Junior high school and below | 196 (35.61) | 164 (29.71) | 360 (32.61) | | High school and secondary specialized school | 157 (28.44) | 175 (31.70) | 332 (30.07) | | Junior college | 136 (24.64) | 126 (22.83) | 262 (23.73) | | Bachelor degree and above | 63 (11.41) | 87 (15.76) | 150 (13.59) | | Age of fathers (years) | 34.86 ± 5.20 | 34.86 ± 5.20 | 34.92 ± 5.02 |
| | Ethnicity of fathers | | Han | 505 (91.49) | 527 (95.47) | 1032 (93.48) | | Minorities | 47 (8.51) | 25 (4.53) | 72 (6.52) |
| | Fathers’ education | | Junior high school and below | 168 (30.43) | 128 (23.19) | 296 (26.81) | | High school and secondary specialized school | 168 (30.43) | 180 (32.61) | 348 (31.52) | | Junior college | 117 (21.20) | 110 (19.93) | 227 (20.56) | | Bachelor degree and above | 99 (17.93) | 134 (24.82) | 233 (21.11) |
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