Factors associated with the main study outcome (mean acuity in worse seeing eye) and their distributions in the two groups (children who received screening compared with those who did not) (n = 6081)
| No | Worse eye acuity (logMAR units) mean = −0.009 (SD = 0.098) (n = 5474) | Distribution in children who received PSVS (n = 1019) (%) | Distribution in children who did not receive PSVS (n = 5062) (%) | |
|---|---|---|---|---|
| Also tested and not significantly associated with the outcome were: Use of car (yes/no), Alcohol consumption 1st trimester (none/<1 glass/week), 1+ glass/week), Alcohol consumption 2nd trimester (none/<1 glass/week), 1+ glass/week), Hard drug use during pregnancy (yes/no). | ||||
| The number for each cell differs from the totals shown in the header columns when there are incomplete data for some children for that variable. | ||||
| 1st degree relative has history of squint or lazy eye | ||||
| No | 4578 | −0.012 (0.091) | 862 (84.6%) | 4231 (83.6%) |
| Yes | 895 | 0.007 (0.128) | 157 (15.4%) | 831 (16.4%) |
| F (p) | 30.40 (<0.0001) | |||
| Sex | ||||
| Male | 2557 | −0.012 (0.093) | 531 (52.1%) | 2384 (50.2%) |
| Female | 2593 | −0.005 (0.099) | 488 (47.9%) | 2364 (49.8%) |
| F (p) | 7.90 (0.005) | |||
| Housing tenure | ||||
| Owned/mortgaged | 4083 | −0.011 (0.096) | 778 (83.8%) | 3708 (82.1%) |
| Council | 458 | 0.005 (0.105) | 76 (8.2%) | 456 (10.1%) |
| Rented | 373 | −0.012 (0.090) | 74 (8.0%) | 354 (7.8%) |
| F (p) | 5.27 (0.005) | |||
| Mum’s highest educational level | ||||
| Vocational/CSE | 1049 | 0.003 (0.108) | 167 (17.9%) | 1013 (22.6%) |
| GCSE/O level | 1752 | −0.009 (0.091) | 300 (32.2%) | 1642 (36.7%) |
| A level or higher | 2078 | −0.017 (0.095) | 464 (49.9%) | 1823 (40.7%) |
| F (p) | 15.27 (<0.0001) | |||
| Maternal age (years) | ||||
| < 25 | 812 | −0.006 (0.087) | 149 (15.4%) | 777 (16.4%) |
| 25–29 | 2060 | −0.004 (0.101) | 354 (36.6%) | 1933 (40.7%) |
| 30+ | 2278 | −0.014 (0.096) | 465 (48.0%) | 2038 (42.0%) |
| F (p) | 6.36 (0.002) | |||
| Smoked 1st trimester | ||||
| None | 4024 | −0.011 (0.092) | 776 (90.1%) | 3675 (80.3%) |
| 1–9 | 468 | −0.008 (0.102) | 18 (2.1%) | 427 (9.3%) |
| 10+ | 477 | 0.007 (0.127) | 67 (7.8%) | 476 (10.4%) |
| F (p) | 8.12 (<0.0001) | |||
| Smoked 2nd trimester | ||||
| None | 4239 | −0.011 (0.093) | 809 (86.7%) | 3877 (84.8%) |
| 1–9 | 362 | −0.004 (0.108) | 73 (7.8%) | 325 (7.1%) |
| 10+ | 368 | 0.103 (0.124) | 51 (5.5%) | 372 (8.1%) |
| F (p) | 9.11 (<0.0001) | |||
| Birth weight | ||||
| < 2500 g | 282 | 0.026 (0.131) | 50 (5.2%) | 263 (5.6%) |
| 2500–3999 g | 4174 | −0.010 (0.090) | 811 (83.9%) | 3825 (81.1%) |
| 4000 g | 665 | −0.013 (0.117) | 106 (11.0%) | 629 (13.3%) |
| F (p) | 19.44 (<0.0001) | |||
| Gestation | ||||
| < 37 weeks | 317 | 0.012 (0.112) | 57 (5.9%) | 291 (6.1%) |
| 37+ weeks | 4833 | −0.010 (0.095) | 911 (94.1%) | 4457 (93.9%) |
| F (p) | 15.44 (<0.0001) | |||
| Admission to SCBU | ||||
| Yes | 336 | 0.005 (0.102) | 61 (6.6%) | 306 (6.9%) |
| No | 4507 | −0.011 (0.094) | 864 (93.4%) | 4132 (93.1%) |
| F (p) | 9.34 (0.002) | |||
| Duration of breastfeeding | ||||
| Never | 876 | 0.003 (0.106) | 152 (17.2%) | 817 (19.7%) |
| < 3 months | 706 | −0.007 (0.087) | 135 (15.3%) | 564 (13.6%) |
| 3+ months | 3050 | −0.016 (0.093) | 598 (67.5%) | 2766 (66.7%) |
| F (p) | 15.32 (<0.0001) | |||