Table 1 Descriptive statistics and missing observations within the study population (N鈥�=鈥�4554)
| 听 | Unweighted | Weighted | Missing (N (%) |
|---|---|---|---|
Exposures | 听 | 听 | 听 |
Age at first alcoholic drink N (%) | 听 | 听 | 0 (0.00) |
鈮も赌�14 | 1065 (23.39) | 1232 (27.05) | 听 |
15 | 810 (17.79) | 763 (16.74) | 听 |
16 | 1362 (29.91) | 1241 (27.26) | 听 |
17 | 874 (19.19) | 878 (19.29) | 听 |
鈮モ赌�18 | 326 (7.16) | 305 (6.69) | 听 |
No alcohol use | 117 (2.57) | 135 (2.96) | 听 |
AUDIT score at 17 years old N (%) | 听 | 听 | 302 (6.63) |
Low-risk (0鈥�7) | 2675 (62.91) | 2650 (62.33) | 听 |
Increasing risk (8鈥�15) | 1369 (32.20) | 1368 (32.18) | 听 |
High-risk (>鈥�15) | 208 (4.90) | 234 (5.49) | 听 |
Outcomes | 听 | 听 | 听 |
AUDIT score at 20 years old N (%) | 听 | 听 | 0 (0.00) |
Low/increasing risk (鈮も��15) | 3871 (85.00) | 3941 (86.53) | 听 |
High-risk (>鈥�15) | 683 (15.00) | 613 (13.47) | 听 |
Tobacco use at 20 years old N (%): yes | 1736 (38.12) | 1744 (38.29) | 0 (0.00) |
Cannabis use at 20 years old N (%): yes | 1233 (27.08) | 1109 (24.35) | 0 (0.00) |
Other drug use at 20 years old N (%): yes | 1266 (27.80) | 1270 (27.90) | 0 (0.00) |
Covariates | 听 | 听 | 0 (0.00) |
Age at outcome mean (SD) | 20.10 (0.29) | 20.07 (0.29) | 听 |
Sex N (%): female | 2362 (51.87) | 2270 (49.84) | 0 (0.00) |
Drumcondra reading test median (IQR) | 77.80 (63.90鈥�88.90) | 72.50 (52.50鈥�85.00) | 84 (1.85) |
TIPI Extraversion median (IQR) | 3.50 (2.50鈥�5.50) | 3.50 (2.50鈥�5.50) | &濒迟;鈥�0.66%* |
TIPI Agreeableness median (IQR) | 5.50 (3.50鈥�7.00) | 5.00 (3.50鈥�7.00) | &濒迟;鈥�0.66%* |
TIPI Emotional Stability median (IQR) | 4.50 (3.00鈥�6.50) | 4.00 (3.00鈥�6.50) | &濒迟;鈥�0.66%* |
TIPI Openness to experiences median (IQR) | 4.50 (3.00鈥�6.50) | 5.00 (3.00鈥�6.50) | &濒迟;鈥�0.66%* |
TIPI Conscientiousness median (IQR) | 4.50 (3.00鈥�6.50) | 4.00 (2.50鈥�7.00) | &濒迟;鈥�0.66%* |
Parental monitoring median (IQR) | 42.0 (39.0鈥�44.0) | 42 (38鈥�44) | &濒迟;鈥�0.66%* |
SDQ Conduct N (%) | 听 | 听 | 0 (0.00) |
Normal | 3563 (78.24) | 3344 (73.44) | 听 |
Borderline | 534 (11.73) | 602 (13.22) | 听 |
Abnormal | 457 (10.04) | 608 (13.35) | 听 |
SDQ Hyperactivity N (%) | 听 | 听 | 0 (0.00) |
Normal | 3598 (79.01) | 3341 (73.36) | 听 |
Borderline | 353 (7.75) | 423 (9.29) | 听 |
Abnormal | 603 (13.24) | 790 (17.35) | 听 |
Household social class N (%) | 听 | 听 | 0 (0.00) |
Professional | 824 (18.09) | 466 (10.23) | 听 |
Managerial & technical | 1890 (41.50) | 1485 (32.60) | 听 |
Non-manual | 831 (18.25) | 887 (19.47) | 听 |
Manual | 805 (17.68) | 1230 (27.02) | 听 |
Other | 204 (4.48) | 486 (10.68) | 听 |
Parental education N (%) | 听 | 听 | 0 (0.00) |
3rd level degree | 2082 (45.72) | 1295 (28.44) | 听 |
3rd level non-degree | 1137 (24.97) | 1038 (22.80) | 听 |
High secondary &/TechVoc | 1077 (23.65) | 1551 (34.05) | 听 |
Low secondary or less | 258 (5.67) | 670 (14.71) | 听 |
Household structure N (%) | 听 | 听 | 0 (0.00) |
Two-parent | 4060 (89.15) | 3662 (80.42) | 听 |
One-parent | 494 (10.85) | 892 (19.58) | 听 |
Familial AUD/drug-use N (%): yes | 455 (9.99) | 586 (12.88) | 0 (0.00) |
Parental smoking N (%): yes | 1967 (43.19) | 2271 (49.86) | 0 (0.00) |
Peer drunkenness N (%): yes | 4321 (95.53) | 4285 (94.74) | 31 (0.68) |
Peer tobacco use N (%): yes | 3635 (80.40) | 3632 (80.34) | 33 (0.72) |
Peer cannabis use N (%): yes | 2632 (58.32) | 2571 (56.97) | 41 (0.90) |
Neighbourhood substance use N (%): common | 9%* | 12%* | &濒迟;鈥�0.66%* |