Cases | Controls (n = 29 837) | Complex or moderate CHD vs no CHD (adjusted OR* (95% CI)) | Simple CHD vs no CHD (adjusted OR* (95% CI)) | ||
Complex or moderate (n = 2247) | Simple (n = 7250) | ||||
Specialist referrals, 2002–4 | |||||
0 | 1457 | 4880 | 22 744 | 1.0 | 1.0 |
1–3 | 726 | 2205 | 6495 | 1.8 (1.5 to 2.2) | 1.7 (1.5 to 1.9) |
⩾4 | 64 | 165 | 598 | 1.6 (1.0 to 2.6) | 1.3 (1.0 to 1.8) |
Prescriptions, 2002–4 | |||||
0 | 190 | 812 | 5612 | 1.0 | 1.0 |
1–9 | 685 | 2976 | 11 264 | 1.6 (1.1 to 2.1) | 1.5 (1.3 to 1.8) |
10–19 | 345 | 1175 | 4125 | 2.3 (1.7 to 3.3) | 1.8 (1.5 to 2.1) |
⩾20 | 1027 | 2287 | 8836 | 4.0 (2.9 to 5.4) | 1.9 (1.6 to 2.2) |
GP consultations 2002–4 | |||||
0 | 171 | 661 | 4773 | 1.0 | 1.0 |
1–9 | 1130 | 4092 | 15 982 | 1.9 (1.4 to 2.7) | 1.7 (1.4 to 2.0) |
10–19 | 579 | 1677 | 5853 | 2.8 (2.0 to 4.0) | 2.0 (1.7 to 2.4) |
⩾20 | 367 | 820 | 3229 | 4.3 (3.0 to 6.1) | 2.1 (1.7 to 2.6) |
*Adjusted for deprivation and smoking.
CHD, congenital heart disease.