Proportion hypospadias cases by year of birth
| 1980–89 period | 1992–96 period | ||||||
|---|---|---|---|---|---|---|---|
| Hypospadias cases* | Hypospadias cases* | ||||||
| Year of birth | All congenital anomalies* | n | % | Year of birth | All congenital anomalies* | n | % |
| *Cases with maternal occupation recorded. | |||||||
| 1980 | 3034 | 236 | 7.8 | 1992 | 1499 | 134 | 8.9 |
| 1981 | 2839 | 231 | 8.1 | 1993 | 1473 | 151 | 10.3 |
| 1982 | 2668 | 251 | 9.4 | 1994 | 1194 | 136 | 11.4 |
| 1983 | 2880 | 272 | 9.4 | 1995 | 1193 | 111 | 9.3 |
| 1984 | 2924 | 312 | 10.7 | 1996 | 1353 | 145 | 10.7 |
| 1985 | 2859 | 275 | 9.6 | p for trend = 0.27 | |||
| 1986 | 2966 | 286 | 9.6 | Total | 6712 | 677 | 10.1 |
| 1987 | 3107 | 319 | 10.3 | ||||
| 1988 | 3011 | 302 | 10.0 | ||||
| 1989 | 2962 | 310 | 10.5 | ||||
| p for trend < 0.001 | |||||||
| Total | 29250 | 2794 | 9.6 | ||||