Characteristics of participants
| Characteristics | Questionnaire | Seven day diary | ||
|---|---|---|---|---|
| n | (%) | n | (%) | |
| Participants | 143 | (100) | 47 | (100) |
| Age group | ||||
| 18–24 years | 16 | (11.2) | 4 | (8.5) |
| 25–34 years | 84 | (58.7) | 32 | (68.1) |
| 35–44 years | 43 | (30.1) | 11 | (23.4) |
| Education | ||||
| None | 2 | (1.4) | 1 | (2.1) |
| GCSE | 15 | (10.5) | 3 | (6.4) |
| A level | 20 | (14.0) | 4 | (8.5) |
| Degree | 93 | (65.0) | 36 | (76.6) |
| Other | 11 | (7.7) | 2 | (4.3) |
| Status not given | 2 | (1.4) | 1 | (2.1) |
| Employment | ||||
| Employed | 95 | (66.4) | 31 | (66.0) |
| Unemployed | 47 | (32.9) | 16 | (34.0) |
| Status not given | 1 | (0.7) | 0 | (0) |
| Previous children | ||||
| 0 | 83 | (58.0) | 29 | (61.7) |
| 1 | 37 | (25.9) | 12 | (25.5) |
| 2 | 14 | (9.8) | 2 | (4.3) |
| 3 | 3 | (2.1) | 1 | (2.1) |
| 5 | 1 | (0.7) | 1 | (2.1) |
| 6 | 2 | (1.4) | 1 | (2.1) |
| Status not given | 3 | (2.1) | 1 | (2.1) |
| Household income | ||||
| Under £10 000 | 13 | (9.1) | 1 | (2.1) |
| £10 000–£20 000 | 8 | (5.6) | 3 | (6.4) |
| £20 000–£30 000 | 15 | (10.5) | 3 | (6.4) |
| £30 000–£50 000 | 19 | (13.3) | 4 | (8.5) |
| £50 000–£100 000 | 52 | (36.4) | 21 | (44.7) |
| Over £100 000 | 26 | (18.2) | 11 | (23.4) |
| Status not given | 10 | (7.0) | 4 | (8.5) |
| Smoking | ||||
| Smoker | 11 | (7.7) | 2 | (4.3) |
| Non-smoker | 130 | (90.9) | 45 | (95.7) |
| Status not given | 2 | (1.4) | 0 | (0) |
| Ethnic background | ||||
| White | 107 | (74.8) | 39 | (83.0) |
| Black | 15 | (10.5) | 3 | (6.4) |
| Oriental | 2 | (1.4) | 1 | (2.1) |
| Indian | 5 | (3.5) | 1 | (2.1) |
| Other | 11 | (7.7) | 3 | (6.4) |
| Status not given | 7 | (4.9) | 0 | (0) |