Prevalence of neural tube defects per 1000 births in each district (number of cases in parentheses)
| Blackpool | Fleetwood | North Fylde | South Fylde | Total | |
|---|---|---|---|---|---|
| Anencephaly | |||||
| 1957-61 | 3.3 (30) | 4.6 (12) | 3.7 (10) | 1.8 (7) | 3.2 (59) |
| 1962-6 | 3.2 (33) | 2.7 (7) | 3.2 (11) | 0.4 (2) | 2.5 (53) |
| 1967-73 | 1.8 (22) | 1.0 (3) | 1.5 (7) | 0.5 (3) | 1.4 (35) |
| Total | 2.7 (85) | 2.7 (22) | 2.6 (28) | 0.8 (12) | 2.3 (147) |
| Spina bifida and cranium bifidum | |||||
| 1957-61 | 3.3 (30) | 3.5 (9) | 3.0 (8) | 2.3 (9) | 3.1 (56) |
| 1962-6 | 3.1 (32) | 5.5 (14) | 1.4 (5) | 1.5 (7) | 2.8 (58) |
| 1967-73 | 2.5 (30) | 2.0 (6) | 2.3 (11) | 1.4 (8) | 2.1 (55) |
| Total | 2.9 (92) | 3.5 (29) | 2.2 (24) | 1.7 (24) | 2.6 (169) |