Table 5 Phenotypic characteristics of thumb duplication in group A
From: Epidemiological statistics of congenital thumb duplication in the Chinese population
Variables | Total | I | II | III | IV | V | VI | VII | Rudimentary | P | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
N | N | % | N | % | N | % | N | % | N | % | N | % | N | % | N | % | ||
Sex | ||||||||||||||||||
Male | 1400 | 41 | 2.9 | 194 | 13.9 | 127 | 9.1 | 580 | 41.4 | 149 | 10.6 | 62 | 4.4 | 136 | 7.9 | 111 | 7.9 | 0.096 |
Female | 879 | 26 | 3.0 | 157 | 17.9 | 89 | 10.1 | 325 | 37.0 | 94 | 10.7 | 29 | 3.3 | 97 | 11.0 | 62 | 7.1 | |
Laterality | ||||||||||||||||||
Unilateral | 1771 | 52 | 2.9 | 295 | 16.7 | 178 | 10.1 | 731 | 41.3 | 177 | 10.0 | 63 | 3.6 | 180 | 10.2 | 95 | 5.4a | <0.001b |
Bilateral | 508 | 15 | 3.0 | 65 | 11.0 | 38 | 7.5 | 174 | 34.3 | 66 | 13.0 | 28 | 5.5 | 53 | 10.4 | 78 | 15.4a | |
Sidedness | ||||||||||||||||||
Left | 898 | 18 | 2.0 | 138 | 15.4 | 91 | 10.1 | 348 | 38.8 | 90 | 10.0 | 42 | 4.7 | 91 | 10.1 | 80 | 8.9 | 0.133 |
Right | 1381 | 49 | 3.5 | 213 | 15.4 | 125 | 9.1 | 557 | 40.3 | 153 | 11.1 | 49 | 3.5 | 142 | 10.3 | 93 | 6.7 | |