Table 2.
The prevalence of LBW among Chinese children under 6 years in 2013.
| Characteristics | Total | Boys | Girls | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Total Number | % | 95% CI | Total Number | % | 95% CI | Total Number | % | 95% CI | |
| Totala | 31,969 | 5.15 | 5.01, 5.33 | 16,439 | 4.57 | 4.39, 4.80 | 15,530 | 5.68 | 5.41, 5.98 |
| Age groups (months) | |||||||||
| 0–11 | 8682 | 4.78 | 4.47, 5.07 | 4436 | 4.15 | 3.76, 4.56 | 4246 | 5.33 | 4.87, 5.81 |
| 12–23 | 5172 | 5.27 | 4.85, 5.73 | 2704 | 4.85 | 4.33, 5.46 | 2468 | 5.62 | 5.00, 6.30 |
| 24–35 | 4515 | 5.48 | 5.04, 5.97 | 2326 | 4.88 | 4.31, 5.51 | 2189 | 6.08 | 5.31, 6.81 |
| 36–47 | 4748 | 5.34 | 4.90, 5.82 | 2454 | 4.48 | 3.96, 5.15 | 2294 | 6.29 | 5.52, 6.99 |
| 48–59 | 4599 | 5.29 | 4.84, 5.77 | 2357 | 4.79 | 4.25, 5.50 | 2242 | 5.75 | 5.12, 6.44 |
| 60–71 | 4253 | 5.18 | 4.64, 5.67 | 2162 | 4.69 | 4.06, 5.33 | 2091 | 5.49 | 4.84, 6.29 |
| Residential area | |||||||||
| East China | 11,600 | 4.60 | 4.32, 4.88 | 5918 | 4.08 | 3.79, 4.45 | 5682 | 5.15 | 4.73, 5.60 |
| Central China | 10,054 | 3.75 | 3.52, 4.01 | 5193 | 3.35 | 3.03, 3.69 | 4861 | 4.13 | 3.77, 4.56 |
| West China | 10,315 | 7.34 | 6.95, 7.72 | 5328 | 6.58 | 6.07, 7.01 | 4987 | 8.02 | 7.44, 8.64 |
| Urban | |||||||||
| Subtotal | 16,421 | 4.75 | 4.55, 4.99 | 8361 | 4.20 | 3.91, 4.54 | 8060 | 5.22 | 4.91, 5.64 |
| Large cities | 7256 | 4.14 | 3.80, 4.42 | 3666 | 3.57 | 3.17, 3.99 | 3590 | 4.60 | 4.16, 5.14 |
| Medium and small cities | 9165 | 5.28 | 4.97, 5.63 | 4695 | 4.76 | 4.35, 5.21 | 4470 | 5.80 | 5.33, 6.32 |
| Rural | |||||||||
| Subtotal | 15,548 | 5.57 | 5.36, 5.86 | 8078 | 5.00 | 4.69, 5.32 | 7470 | 6.21 | 5.75, 6.58 |
| Non-poor rural areas | 10,451 | 4.85 | 4.57, 5.15 | 5398 | 4.26 | 3.95, 4.67 | 5053 | 5.44 | 4.98, 5.91 |
| Poor rural areas | 5097 | 6.61 | 6.68, 7.58 | 2680 | 6.53 | 5.90, 7.23 | 2417 | 7.77 | 7.06, 8.69 |
| Ethnicity | |||||||||
| Han | 27,828 | 4.83 | 4.66, 5.00 | 14,238 | 4.24 | 3.99, 4.48 | 13,590 | 5.43 | 5.15, 5.64 |
| Minority | 4132 | 7.52 | 6.94, 8.11 | 2196 | 7.14 | 6.38, 7.98 | 1936 | 7.76 | 6.98, 8.77 |
| Maternal age groups | |||||||||
| < 20 years | 351 | 8.84 | 6.77, 11.39 | 178 | 7.61 | 5.20, 11.04 | 173 | 10.24 | 7.01, 14.45 |
| 20–25 years | 7558 | 5.19 | 4.81, 5.52 | 3880 | 4.91 | 4.41, 5.39 | 3678 | 5.40 | 4.92, 6.00 |
| 26–30 years | 11,213 | 4.59 | 4.33, 4.87 | 5914 | 3.94 | 3.66, 4.30 | 5299 | 5.19 | 4.77, 5.63 |
| 31–35 years | 7278 | 4.63 | 4.25, 4.94 | 3727 | 3.99 | 3.60, 4.47 | 3551 | 5.17 | 4.71, 5.78 |
| > 35 years | 3752 | 5.93 | 5.42, 6.48 | 1974 | 5.11 | 4.47, 5.85 | 1778 | 6.79 | 5.95, 7.72 |
| Maternal education | |||||||||
| Primary or below | 3758 | 7.24 | 6.69, 7.97 | 2048 | 6.17 | 5.52, 7.00 | 1710 | 8.46 | 7.46, 9.53 |
| Junior high school | 14,331 | 5.07 | 4.86, 5.34 | 7479 | 4.62 | 4.27, 4.93 | 6852 | 5.54 | 5.21, 5.99 |
| High school | 5535 | 4.43 | 4.12, 4.83 | 2885 | 3.78 | 3.34, 4.23 | 2650 | 5.20 | 4.63, 5.84 |
| Associate's degree | 3372 | 4.44 | 3.95, 4.94 | 1661 | 4.26 | 3.63, 4.99 | 1711 | 4.48 | 3.83, 5.20 |
| Bachelor's degree or above | 3331 | 3.65 | 3.26, 4.14 | 1686 | 3.10 | 2.58, 3.68 | 1645 | 4.30 | 3.66, 5.02 |
| Annual household income (per capital CNY)b | |||||||||
| < 10,000 | 11,102 | 6.42 | 6.08, 6.77 | 5759 | 5.70 | 5.26, 6.07 | 5343 | 7.11 | 6.70, 7.68 |
| 10,000–19,999 | 8815 | 4.60 | 4.25, 4.92 | 4550 | 4.25 | 3.85, 4.67 | 4265 | 4.84 | 4.42, 5.32 |
| ≥ 20,000 | 8819 | 4.18 | 3.92, 4.55 | 4491 | 3.68 | 3.34, 4.07 | 4328 | 4.69 | 4.27, 5.15 |
aInformation on preterm was missing for 307 subjects.
b3251 of subjects refused to answer the question about annual household income.