Table 1.
Characteristics of Participants
| All women (n = 6,227),n (%) | Smokers(n = 2,001), n (%) | Quit 18 week (n = 547), n (%) | Quit 22 week (n = 849), n (%) | |
| Age (years) | ||||
| <20 | 209 (3) | 143 (7) | 29 (5) | 63 (7) |
| 20–29 | 3,582 (58) | 1,285 (64) | 340 (62) | 535 (63) |
| >30 | 2,436 (39) | 573 (29) | 178 (33) | 251 (30) |
| Age started smoking (years) | ||||
| <16 | n/a | 746 (38) | 156 (29) | 275 (33) |
| 16–19 | n/a | 1048 (53) | 304 (56) | 457 (54) |
| 20+ | n/a | 186 (9) | 80 (15) | 110 (13) |
| Socioeconomic statusa | ||||
| I/II | 1,905 (35) | 442 (26) | 146 (30) | 218 (30) |
| III | 2,935 (54) | 938 (56) | 265 (55) | 405 (55) |
| IV/V | 624 (11) | 293 (18) | 70 (15) | 114 (15) |
| Educational levelb | ||||
| CSE/vocational | 1,786 (29) | 832 (42) | 174 (32) | 296 (35) |
| O-level | 2,217 (36) | 704 (35) | 206 (38) | 300 (35) |
| A-level/degree | 2,199 (35) | 457 (23) | 166 (30) | 251 (30) |
| Parityc | ||||
| 0 | 2,827 (46) | 986 (50) | 318 (59) | 509 (61) |
| 1 | 2,168 (35) | 593 (30) | 149 (28) | 207 (25) |
| 2+ | 1,160 (19) | 389 (20) | 70 (13) | 120 (14) |
| Partner smoking | ||||
| Yes | 2,168 (36) | 1,165 (62) | 267 (50) | 422 (52) |
| No | 3,839 (64) | 719 (38) | 263 (50) | 385 (48) |
Note. A-level = Advanced Level; CSE = Certificate of Secondary Education; n/a = not applicable; O-level = Ordinary Level.
a
Data on socioeconomic status based upon the Registrar General's 1980 (Szreter, 1984) classification (I, II, III Non-Manual, III Manual, IV, and V, where I represents professional and V unskilled manual).
b
Educational data ranked according to level of attainment (lowest: CSE/vocational and highest: A-level/degree), with O-level qualifications typically taken at 16 years and A-level qualifications typically taken at 18 years.
c
Parity indicates the number of times the participant had given birth.