Table 3 Distribution of the types of thumb polydactyly in 2562 hands (group A)
From: Epidemiological statistics of congenital thumb duplication in the Chinese population
Wassel type | Male | Female | Left | Right | Unilateral | Bilateral | Total | (%) |
|---|---|---|---|---|---|---|---|---|
(Number of hands) | ||||||||
I | 41 | 26 | 18 | 49 | 52 | 15 | 67 | 2.6 |
II | 194 | 157 | 138 | 213 | 295 | 56 | 351 | 13.7 |
III | 127 | 89 | 91 | 125 | 178 | 38 | 216 | 8.4 |
IV | 580 | 325 | 348 | 557 | 731 | 174 | 905 | 35.3 |
V | 149 | 94 | 90 | 153 | 177 | 66 | 243 | 9.5 |
VI | 62 | 29 | 42 | 49 | 63 | 28 | 91 | 3.6 |
VII | 136 | 97 | 91 | 142 | 180 | 53 | 233 | 9.1 |
Rudimentary | 111 | 62 | 80 | 93 | 95 | 78 | 173 | 6.8 |
Others | 168 | 115 | 113 | 170 | 193 | 90 | 283 | 11.0 |
Total | 1568 | 994 | 1011 | 1551 | 1964 | 598 | 2562 | 100 |