Table 1:
Prevalence of BD by different characteristics of infants in 2008, Hubei Province
| Characteristic variable | Number of BDs † | Total births | Total prevalence per 10,000 births (95% CI†) | χ2 value | P value |
|---|---|---|---|---|---|
| Residence | |||||
| Urban | 589 | 42,342 | 139.1 (127.9 to 150.3) | 0.03 | 0.855 |
| Suburb | 372 | 27,066 | 137.4 (123.6 to 151.3) | ||
| Sex of infant | |||||
| Male | 542 | 37,566 | 144.3 (132.2 to 156.3) | 5.24 | 0.022* |
| Female | 395 | 31,818 | 124.1 (112 to 136.3) | ||
| Unclear‡ | 24 | 24 | – | ||
| Maternal age, y | |||||
| <20 | 14 | 1,004 | 139.4 (67 to 212) | 5.69 | 0.224 |
| 20- | 336 | 22,583 | 148.8 (133 to 164.6) | ||
| 25- | 380 | 29,146 | 130.4 (117.4 to 143.4) | ||
| 30- | 157 | 12,106 | 129.7 (109.5 to 149.9) | ||
| 35- | 74 | 4,569 | 162 (125.4 to 198.6) | 1.98 | 0.160 |
*
P<0.05 (significant difference).
†
BDs, birth defects; CI, confidence interval
‡
When compared unclear group did not included.