Table 4 Prevalence of polydactyly and syndactyly by residence
From: Epidemiology of congenital polydactyly and syndactyly in Hunan Province, China
Types | Urban (N: 342,178) | Rural (N: 505,577) | OR(95%CI) (Reference: rural) | ||
|---|---|---|---|---|---|
n | Prevalence (‰,95%CI) | n | Prevalence (‰,95%CI) | ||
Polydactyly | 912 | 2.67(2.49–2.84) | 976 | 1.93(1.81–2.05) | 1.38(1.26–1.51) |
 Hand polydactyly | 776 | 2.27(2.11–2.43) | 821 | 1.62(1.51–1.73) | 1.40(1.27–1.54) |
 Foot polydactyly | 158 | 0.46(0.39–0.53) | 185 | 0.37(0.31–0.42) | 1.26(1.02–1.56) |
Syndactyly | 312 | 0.91(0.81–1.01) | 314 | 0.62(0.55–0.69) | 1.47(1.26–1.72) |
 Hand syndactyly | 171 | 0.50(0.42–0.57) | 171 | 0.34(0.29–0.39) | 1.48(1.20–1.83) |
 Foot syndactyly | 154 | 0.45(0.38–0.52) | 166 | 0.33(0.28–0.38) | 1.37(1.10–1.71) |