Table 2– Sociodemographic factors, patients’ educational background and associations with case status (long-term survival)
AllCasesControlsOR (95% CI)Wald test p-value
Subjects n23078152
Source of referral
 Adult consultant/GP102 (44.9)47 (61.0)55 (36.7)1.000.01
 Clinic A#26 (11.5)9 (11.7)17 (11.3)0.78 (0.31–1.97)
 Clinic B47 (20.7)4 (5.2)43 (28.7)0.13 (0.04–0.38)
 Other paediatrician35 (15.4)11 (14.3)24 (16.0)0.56 (0.24–1.28)
 Other17 (7.5)6 (7.8)11 (7.3)0.65 (0.22–1.92)
Guardian's occupation
 Professional19 (14.8)6 (11.3)13 (17.3)1.000.87
 Managerial48 (37.5)21 (39.6)27 (36.0)1.61 (0.51–5.03)
 Skilled50 (39.1)21 (39.6)29 (38.7)1.54 (0.49–4.81)
 Partly skilled/unskilled11 (8.6)5 (9.4)6 (8.0)1.53 (0.32–7.33)
School disruption
 None105 (49.8)51 (66.2)54 (40.3)1.00<0.01
 Mild76 (36.0)17 (22.1)59 (44.0)0.32 (0.16–0.63)
 Gross30 (14.2)9 (11.7)21 (15.7)0.51 (0.21–1.23)
Number of A-levels
 0115 (70.1)47 (71.2)68 (69.4)1.000.88
 1–224 (14.6)10 (15.2)14 (14.3)0.92 (0.37–2.29)
 ≥325 (15.2)9 (13.6)16 (16.3)0.79 (0.31–1.99)
Siblings n2 (1–3)2 (1–3)2 (1–2.8)1.06 (0.89–1.26)0.50
Any siblings with CF
 No133 (58.9)45 (57.7)88 (59.5)1.00
 Yes93 (41.2)33 (42.3)60 (40.5)1.04 (0.59–1.84)0.89
  • Data are presented as n (%) or median (interquartile range), unless otherwise stated. ORs were derived from weighted logistic regression models. GP: general practitioner; A-level: Advanced level school examination; CF; cystic fibrosis. #: clinic A is a paediatric clinic in a high socioeconomic status area; : clinic B is a paediatric clinic in a low socioeconomic status area.