Table 1 Early life characteristics and RF in Hertfordshire Cohort Study men, n = 675.
| Characteristic | Frequency | RF +ve cases | Odds ratio (95% CI) | |
|---|---|---|---|---|
| No (%) | Univariate | Mutually adjusted | ||
| Birth weight (g) | ||||
| <3175 | 215 | 43 (20.0) | 1.0 | 1.0 |
| 3175–3629 | 233 | 36 (15.5) | 0.73 (0.45 to 1.19) | 0.76 (0.46 to 1.25) |
| >3629 | 227 | 33 (14.5) | 0.68 (0.41 to 1.12) | 0.69 (0.41 to 1.15) |
| p = 0.26 on 2df | p = 0.32 on 2df | |||
| Weight at 1 year (g) | ||||
| <9752 | 236 | 38 (16.1) | 1.0 | |
| 9752–10575 | 199 | 34 (17.1) | 1.07 (0.65 to 1.78) | Not included in model |
| >10575 | 240 | 40 (16.7) | 1.04 (0.64 to 1.69) | |
| p = 0.96 on 2df | ||||
| Conditional growth | ||||
| Lowest third | 223 | 29 (13.0) | 1.0 | 1.0 |
| Middle third | 222 | 41 (18.5) | 1.52 (0.90 to 2.54) | 1.57 (0.92 to 2.68) |
| Highest third | 230 | 42 (18.3) | 1.49 (0.89 to 2.50) | 1.54 (0.90 to 2.63) |
| p = 0.22 on 2df | p = 0.19 on 2df | |||
| Social class (III–V v I–IIINM) | ||||
| I–IIINM | 107 | 13 (12.1) | 1.0 | 1.0 |
| IIIM–V | 527 | 91 (17.3) | 1.51 (0.81 to 2.81) | 1.59 (0.85 to 3.00) |
| Missing/unclassified | 41 | 8 (19.5) | 1.75 (0.67 to 4.61) | 1.73 (0.65 to 4.62) |
| p = 0.38 on 2df | p = 0.33 | |||
| Shared bedroom as child* | ||||
| No | 294 | 50 (17.0) | 1.0 | 1.0 |
| Yes | 377 | 62 (16.4) | 0.96 (0.64 to 1.44) | 1.01 (0.63 to 1.59) |
| p = 0.85 | p = 0.98 | |||
| Birth order | ||||
| 1st | 262 | 46 (17.6) | 1.0 | 1.0 |
| 2nd–4th | 323 | 49 (15.2) | 0.84 (0.54 to 1.30) | 0.88 (0.55 to 1.42) |
| ⩾5th | 89 | 17 (19.1) | 1.11 (0.60 to 2.05) | 1.28 (0.64 to 2.60) |
| p = 0.59 on 2df | p = 0.50 on 2df | |||
*Four results missing.