Potential predictors of job choice based on first job and using an asthma specific job exposure matrix (N=5020)
| Occupational exposure group (based on a job exposure matrix) | χ2 (df)¶ | |||
| Reference | Low risk | High risk | ||
| n (row %) | n (row %) | n (row %) | ||
| Father's social class at birth | ||||
| Professional I | 162 (66.4) | 35 (14.3) | 47 (19.3) | p<0.001 (df=10) |
| Managerial or technical II | 432 (58.9) | 161 (22.0) | 140 (19.1) | |
| Skilled non-manual IIInm | 339 (64.2) | 114 (21.6) | 75 (14.2) | |
| Skilled manual IIIm | 1288 (51.7) | 734 (29.5) | 467 (18.8) | |
| Partly skilled IV | 297 (48.5) | 179 (29.2) | 136 (22.2) | |
| Unskilled V | 165 (41.9) | 140 (35.5) | 89 (22.6) | |
| Other/unknown | 9 (45.0) | 5 (25.0) | 6 (30.0) | |
| School leaving age | ||||
| ≤16 years | 1484 (48.1) | 944 (30.6) | 656 (21.3) | p<0.001 (df=2) |
| ≥17 years | 950 (67.1) | 250 (17.7) | 216 (15.3) | |
| Missing | 258 (49.6) | 174 (33.5) | 88 (16.9) | |
| Continued full-time education on leaving school | ||||
| No | 2056 (52.0) | 1114 (28.2) | 787 (19.9) | p<0.001 (df=2) |
| Yes | 365 (67.8) | 101 (18.8) | 72 (13.4) | |
| Missing | 271 (51.6) | 153 (29.1) | 101 (19.2) | |
| Sex | ||||
| Male | 886 (37.1) | 998 (41.8) | 505 (21.1) | p<0.001 (df=2) |
| Female | 1806 (68.6) | 370 (14.1) | 455 (17.3) | |
| Eczema ages 0–16 years | ||||
| No | 2378 (53.5) | 1221 (27.4) | 850 (19.1) | p=0.681 (df=2) |
| Yes* | 314 (55.0) | 147 (25.7) | 110 (19.3) | |
| Hay fever ages 0–16 years | ||||
| No | 2196 (52.8) | 1142 (27.5) | 822 (19.8) | p=0.013 (df=2) |
| Yes† | 496 (57.7) | 226 (26.3) | 138 (16.0) | |
| Asthma or wheezy bronchitis ages 0–16 years | ||||
| No | 2110 (54.4) | 1035 (26.7) | 735 (18.9) | p=0.279 (df=4) |
| Symptoms: only in childhood‡ | 429 (51.7) | 236 (28.5) | 164 (19.8) | |
| Symptoms: in adolescence§ | 153 (49.2) | 97 (31.2) | 61 (19.6) | |
↵* Eczema reported at ages 7 (including eczema seen at 7), 11 and/or 16.
↵† Hay fever or allergic rhinitis reported at ages 7, 11 and/or 16.
↵‡ Asthma and/or wheezy bronchitis ever, reported at ages 7 and/or 11, but no report at the 16-year follow-up of any attacks since 11th birthday.
↵§ Asthma and/or wheezy bronchitis: most recent attack at ages 11–16 according to parental report at the 16-year follow-up.
↵¶ χ2 Tests exclude missing values.