Table 5 Prevalence of polydactyly and syndactyly by maternal age
From: Epidemiology of congenital polydactyly and syndactyly in Hunan Province, China
Types | < 20 years old (N: 13,711) | 20–24 years old (N: 118,531) | 25–29 years old (N: 357,582) (Reference) | 30–34 years old (N: 243,649) | ≥ 35 years old (N: 114,282) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
n | Prevalence (‰,95%CI) | OR (95%CI) | n | Prevalence (‰,95%CI) | OR (95%CI) | n | Prevalence (‰,95%CI) | n | Prevalence (‰,95%CI) | OR (95%CI) | n | Prevalence (‰,95%CI) | OR (95%CI) | |
Polydactyly | 38 | 2.77(1.89–3.65) | 1.33(0.96–1.85) | 250 | 2.11(1.85–2.37) | 1.02(0.88–1.17) | 743 | 2.08(1.93–2.23) | 555 | 2.28(2.09–2.47) | 1.10(0.98–1.22) | 302 | 2.64(2.34–2.94) | 1.27(1.11–1.45) |
 Hand polydactyly | 34 | 2.48(1.65–3.31) | 1.43(1.01–2.02) | 206 | 1.74(1.50–1.98) | 1.00(0.85–1.17) | 621 | 1.74(1.60–1.87) | 479 | 1.97(1.79–2.14) | 1.13(1.00-1.28) | 257 | 2.25(1.97–2.52) | 1.30(1.12–1.50) |
 Foot polydactyly | 4 | 0.29(0.01–0.58) | 0.75(0.28–2.01) | 48 | 0.40(0.29–0.52) | 1.03(0.75–1.44) | 140 | 0.39(0.33–0.46) | 93 | 0.38(0.30–0.46) | 0.97(0.75–1.27) | 58 | 0.51(0.38–0.64) | 1.30(0.95–1.76) |
Syndactyly | 8 | 0.58(0.18–0.99) | 0.86(0.42–1.74) | 97 | 0.82(0.66–0.98) | 1.20(0.95–1.52) | 243 | 0.68(0.59–0.77) | 185 | 0.76(0.65–0.87) | 1.12(0.92–1.35) | 93 | 0.81(0.65–0.98) | 1.20(0.94–1.52) |
 Hand syndactyly | 1 | 0.07(-0.07-0.22) | 0.20(0.03–1.40) | 51 | 0.43(0.31–0.55) | 1.16(0.84–1.60) | 133 | 0.37(0.31–0.44) | 103 | 0.42(0.34–0.50) | 1.14(0.88–1.47) | 54 | 0.47(0.35–0.60) | 1.27(0.93–1.74) |
 Foot syndactyly | 7 | 0.51(0.13–0.89) | 1.47(0.69–3.15) | 48 | 0.40(0.29–0.52) | 1.17(0.84–1.63) | 124 | 0.35(0.29–0.41) | 91 | 0.37(0.30–0.45) | 1.08(0.82–1.41) | 50 | 0.44(0.32–0.56) | 1.26(0.91–1.75) |