Table 1 Prevalence of congenital hydrocephalus (1/10,000) in China during 2005–2012, stratified by maternal age, residential area, gender, and plurality of pregnancy
Number of Births | Isolated CH (N = 5245) | Associated CH (N = 1245) | Total CH (N = 6490) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
Number | Prevalence (95%CI) | PR (95%CI) | Number | Prevalence (95%CI) | PR (95%CI) | Number | Prevalence (95%CI) | PR (95%CI) | ||
Maternal age (years)a | ||||||||||
< 20 | 196,160 | 155 | 7.90 (6.66–9.15) | 1.88 (1.60–2.22) | 29 | 1.48 (0.94–2.02) | 1.50 (1.03–2.18) | 184 | 9.38 (8.02–10.74) | 1.81 (1.56–2.10) |
20–24 | 2,764,522 | 1677 | 6.07 (5.78–6.36) | 1.45 (1.35–1.54) | 314 | 1.14 (1.01–1.26) | 1.15 (1.00–1.33) | 1991 | 7.20 (6.89–7.52) | 1.39 (1.31–1.48) |
25–29 | 4,435,764 | 1863 | 4.20 (4.01–4.39) | 1.00 (ref) | 438 | 0.99 (0.89–1.08) | 1.00 (ref) | 2301 | 5.19 (4.98–5.40) | 1.00 (ref) |
30–34 | 2,233,043 | 1008 | 4.51 (4.24–4.79) | 1.08 (1.00–1.16) | 279 | 1.25 (1.10–1.40) | 1.27 (1.09–1.47) | 1287 | 5.76 (5.45–6.08) | 1.11 (1.04–1.19) |
≥35 | 944,572 | 540 | 5.72 (5.23–6.20) | 1.36 (1.24–1.50) | 185 | 1.96 (1.68–2.24) | 1.98 (1.67–2.36) | 725 | 7.68 (7.12–8.23) | 1.48 (1.36–1.61) |
Residential areab | ||||||||||
Urban | 5,630,037 | 2323 | 4.13 (3.96–4.29) | 1.00 (ref) | 582 | 1.03 (0.95–1.12) | 1.00 (ref) | 2905 | 5.16 (4.97–5.35) | 1.00 (ref) |
Rural | 4,944,024 | 2920 | 5.91 (5.69–6.12) | 1.43 (1.36–1.51) | 662 | 1.34 (1.24–1.44) | 1.30 (1.16–1.45) | 3582 | 7.25 (7.01–7.48) | 1.40 (1.34–1.48) |
Genderc | ||||||||||
Female | 4,940,848 | 2323 | 4.70 (4.51–4.89) | 1.00 (ref) | 513 | 1.04 (0.95–1.13) | 1.00 (ref) | 2836 | 5.74 (5.53–5.95) | 1.00 (ref) |
Male | 5,630,497 | 2906 | 5.16 (4.97–5.35) | 1.10 (1.04–1.16) | 703 | 1.25 (1.16–1.34) | 1.20 (1.07–1.35) | 3609 | 6.41 (6.20–6.62) | 1.12 (1.06–1.17) |
Plurality of pregnancyd | ||||||||||
Singleton | 10,412,509 | 5051 | 4.85 (4.72–4.98) | 1.00 (ref) | 1190 | 1.14 (1.08–1.21) | 1.00 (ref) | 6241 | 5.99 (5.85–6.14) | 1.00 (ref) |
Multiple | 161,552 | 192 | 11.88 (10.20–13.57) | 2.45 (2.12–2.83) | 55 | 3.40 (2.50–4.30) | 2.98 (2.27–3.91) | 247 | 15.29 (13.38–17.20) | 2.55 (2.25–2.90) |