Table 2.
Prevalence comparison of drug use between ALSPAC and the CSEW
| Past‐year drug use | Lifetime drug use | |||||
|---|---|---|---|---|---|---|
| ALSPAC Weighted 3389 % (95% CI) | CSEW Weighted 1129 % | RD% (95% CI) P value | ALSPAC Weighted 3389 % (95% CI) | CSEW Weighted 1146 % | RD% (95% CI) P value | |
| Any illicit drug use | 36.7 (35.0–38.6) | 16.4 (14.3–18.7) | 20.3 (17.6–23.0) P ≤ 0.001 | 62.8 (61.1–64.6) | 40.6 (37.8–43.5) | 22.2 (19.0–25.5) P ≤ 0.001 |
| Amphetamine | 17.0 (15.7–18.4) | 1.1 (0.6–1.9) | 15.9 (14.5–17.3) P ≤ 0.001 | 32.9 (31.2–34.7) | 8.1 (6.6–9.8) | 24.8 (22.6–27.0) P ≤ 0.001 |
| Anabolic steroids | a | 0.4 (0.01–1.0) | – | a | 1.3 (0.7–2.1) | – |
| Cannabis | 29.2 (27.5–31.0) | 13.8 (11.8–15.9) | 15.4 (12.9–17.9) P ≤ 0.001 | 60.5 (58.7–62.3) | 37.3 (34.5–40.2) | 23.2 (20.0–26.4) P ≤ 0.001 |
| Powder cocaine | 19.6 (18.2–21.2) | 4.8 (3.6–6.2) | 14.8 (13.0–16.6) P ≤ 0.001 | 30.8 (29.1–32.6) | 13.9 (11.9–16.0) | 16.9 (14.4–19.4) P ≤ 0.001 |
| Crack cocaine | 0.2 (0.0–0.5) | 0.0 (0.0–0.3) | 0.2 (0.0–0.4) P = 0.127 | 1.0 (0.6–1.7) | 0.9 (0.4–1.6) | 0.1 (−0.5–0.7) P = 0.764 |
| Ecstasy | b | 3.6 (2.6–4.8) | – | b | 11.1 (9.3–13.0) | – |
| Hallucinogens | 7.3 (6.4–8.3) | 1.5 (0.9–2.4) | 5.8 (4.7–6.9) P ≤ 0.001 | 18.1 (16.7–19.7) | 6.8 (5.4–8.4) | 11.3 (9.3–13.2) P ≤ 0.001 |
| Inhalants | 0.7 (0.5–1.2) | a | – | 2.6 (2.0–3.3) | a | – |
| Injecting drug use | 0.2 (0.0–0.4) | a | – | 0.3 (0.2–0.6) | a | – |
| Ketamine | b | 1.1 (0.6–1.9) | – | b | 5.1 (3.9–6.5) | – |
| Mephedrone | b | 0.4 (0.1–1.0) | – | b | 5.4 (4.2–6.9) | – |
| Nitrous oxide | 20.6 (19.2–22.1) | a | – | 45.6 (43.8–47.5) | a | – |
| Opioids | 2.7 (2.2–3.3) | 0.0 (0.0–0.3) | 2.7 (2.2–3.2) P ≤ 0.001 | 5.0 (4.2–5.9) | 0.9 (0.4–1.6) | 4.1 (3.2–5.0) P ≤ 0.001 |
| Sedatives/tranquilisers | 5.8 (5.0–6.7) | 1.1 (0.6–1.9) | 4.7 (3.7–5.7) P ≤ 0.001 | 11.6 (10.4–12.9) | 3.5 (2.5–4.7) | 8.1 (6.6–9.6) P ≤ 0.001 |
ALSPAC = Avon Longitudinal Study of Parents and Children; CSEW = Crime Survey for England and Wales; RD% = Risk difference % (ALSPAC as comparator).
a
No equivalent in this sample.
b
Included in another category in this sample (see supporting information Data S1 Appendix 1).