Appendix 4.
Distribution of substance use and self-harm among the target and complete case sample.
| Outcomes | Target Sample | Multiple Imputation Sample | Complete Case Sample |
|---|---|---|---|
|
| |||
| Alcohol Use Items (AUDIT) | N (%)a | N (%)a | N (%)b |
|
|
|||
| How often do you have a drink containing alcohol? | |||
| Never | 1,805 (9.90) | 41,034 (22.50) | 632 (16.11) |
| Monthly or less | 3,995 (21.89) | 61,175 (33.55) | 1,553 (39.58) |
| 2–4 times a month | 3,862 (21.18) | 55,121 (30.23) | 1,593 (40.60) |
| 2–3 times a week | 329 (1.80) | 23,916 (13.12) | 145 (3.70) |
| 4 or more times a week | 7 (0.04) | 1,094 (0.60) | 1 (0.03) |
| Missing | 8,239 (45.18) | - | - |
| How many drinks containing alcohol do you have on a typical day when you are drinking? | |||
| 1–2 | 3,668 (20.12) | 69,318 (38.02) | 1,390 (35.42) |
| 3–4 | 2,665 (14.62) | 36,865 (20.22) | 1,095 (27.91) |
| 5–6 | 2,291 (12.56) | 21,714 (17.94) | 917 (23.37) |
| 7–9 | 989 (5.42) | 15,471 (8.48) | 400 (10.19) |
| 10 or more | 321 (1.76) | 27,972 (15.34) | 122 (3.11) |
| Missing | 8,300 (45.52) | - | - |
| How often do you have six or more drinks on one occasion? | |||
| Never | 4,485 (24.60) | 79,295 (43.49) | 1,702 (43.37) |
| Less than monthly | 3,749 (20.56) | 55,354 (30.36) | 1,489 (37.95) |
| Monthly | 1,420 (7.79) | 23,025 (12.63) | 612 (15.60) |
| Weekly | 287 (1.57) | 23,721 (13.01) | 118 (3.01) |
| Daily or almost daily | 5 (0.03) | 945 (0.52) | 3 (0.08) |
| Missing | 8,288 (45.45) | - | - |
| How often during the last year have you found that you were not able to stop drinking once you had started? | |||
| Never | 9,189 (50.39) | 146,350 (80.26) | 3,620 (92.25) |
| Less than monthly | 531 (2.91) | 12,703 (6.97) | 220 (5.61) |
| Monthly | 135 (0.74) | 3,025 (1.66) | 57 (1.45) |
| Weekly | 33 (0.18) | 18,838 (10.33) | 10 (0.25) |
| Daily or almost daily | 45 (0.25) | 1,424 (0.78) | 17 (0.43) |
| Missing | 8,301 (45.52) | - | - |
| How often during the last year have you failed to do what was normally expected from you because of drinking? | |||
| Never | 8,485 (46.53) | 137,543 (75.43) | 3,353 (85.45) |
| Less than monthly | 1,179 (6.47) | 20,758 (11.38) | 467 (11.90) |
| Monthly | 176 (0.97) | 3,686 (2.02) | 74 (1.89) |
| Weekly | 40 (0.22) | 18,890 (10.36) | 15 (0.38) |
| Daily or almost daily | 48 (0.26) | 1,463 (0.80) | 15 (0.38) |
| Missing | 8,306 (45.55) | - | - |
| How often during the last year have you needed a first drink in the morning to get yourself going after a heavy drinking session? | |||
| Never | 9,661 (52.98) | 151,683 (83.19) | 3,822 (97.70) |
| Less than monthly | 237 (1.30) | 9,050 (4.96) | 87 (2.22) |
| Monthly | 32 (0.18) | 2,187 (1.20) | 13 (0.33) |
| Weekly | 8 (0.04) | 18,515 (10.15) | 1 (0.03) |
| Daily or almost daily | 1 (0.01) | 905 (0.50) | 1 (0.03) |
| Missing | 8,295 (45.49) | - | - |
| How often during the last year have you had a feeling of guilt or remorse after drinking? | |||
| Never | 7,878 (43.21) | 129,004 (70.75) | 3,113 (79.33) |
| Less than monthly | 1,791 (9.82) | 29,144 (15.98) | 712 (18.14) |
| Monthly | 200 (1.10) | 3,648 (2.00) | 76 (1.94) |
| Weekly | 51 (0.28) | 19,519 (10.70) | 19 (0.48) |
| Daily or almost daily | 13 (0.07) | 1,025 (0.56) | 4 (0.10) |
| Missing | 8,301 (45.52) | - | - |
| How often during the last year have you been unable to remember what happened the night before because you had been drinking? | |||
| Never | 6,837 (37.50) | 114,533 (62.81) | 2,646 (67.43) |
| Less than monthly | 2,788 (15.29) | 42,533 (23.33) | 1,142 (29.10) |
| Monthly | 287 (1.57) | 4,633 (2.54) | 122 (3.11) |
| Weekly | 31 (0.17) | 19,696 (10.80) | 13 (0.33) |
| Daily or almost daily | 5 (0.03) | 945 (0.52) | 1 (0.03) |
| Missing | 8,286 (45.44) | - | - |
| Have you or someone else been injured as a result of your drinking? | |||
| No | 9,344 (51.24) | 147,257 (80.76) | 3,693 (94.11) |
| Yes, but not in the last year | 300 (1.65) | 11,215 (6.15) | 111 (2.83) |
| Yes, during the last year | 323 (1.77) | 23,868 (13.09) | 120 (3.06) |
| Missing | 8,267 (45.34) | - | - |
| Has a relative or friend, or a doctor or other health worker been concerned about your drinking or suggested you cut down? | |||
| No | 9,411 (51.61) | 147,988 (81.16) | 3,716 (94.70) |
| Yes, but not in the last year | 166 (0.91) | 9,470 (5.19) | 54 (1.38) |
| Yes, during the last year | 399 (2.19) | 24,882 (13.65) | 154 (3.92) |
| Missing | 8,258 (45.29) | - | - |
|
| |||
| Any Drug Use (DUDIT) | |||
| How often do you use drugs other than alcohol? | |||
| Never | 9,319 (51.11) | 154,338 (84.64) | 3,661 (93.30) |
| At least once before | 664 (3.64) | 28,002 (15.36) | 263 (6.70) |
| Missing | 8,251 (45.25) | - | |
|
| |||
| Cigarette Use | |||
| Do you smoke cigarettes? | |||
| No, I have never smoked | 4,548 (24.94) | 80,381 (44.08) | 1,803 (45.95) |
| No, I have only tried | 2,695 (14.78) | 39,022 (21.40) | 1,082 (27.57) |
| No, I quit | 251 (1.38) | 7,137 (3.91) | 91 (2.32) |
| Yes, but only sometimes | 445 (2.44) | 7,192 (3.94) | 164 (4.18) |
| Yes, but only when I am at a party | 1,289 (7.07) | 16,711 (9.16) | 516 (13.15) |
| Yes, but only in the end of the week | 96 (0.53) | 17,933 (9.83) | 41 (1.04) |
| Yes, almost every day | 220 (1.21) | 3,156 (1.73) | 82 (2.09) |
| Yes, every day | 444 (2.44) | 10,808 (5.93) | 145 (3.70) |
| Missing | 8,246 (45.22) | - | - |
|
| |||
| Snuff Use | |||
| Do you use snuff? | |||
| No, I have never smoked | 5,430 (29.78) | 100,956 (55.37) | 2,402 (61.21) |
| No, I have only tried | 2,315 (12.70) | 35,534 (19.49) | 1,006 (25.64) |
| No, I quit | 108 (0.59) | 3,725 (2.01) | 50 (1.27) |
| Yes, but only sometimes | 276 (1.51) | 6,614 (3.63) | 114 (2.91) |
| Yes, but only when I am at a party | 234 (1.28) | 3,924 (2.15) | 130 (3.31) |
| Yes, but only in the end of the week | 29 (0.16) | 10,815 (5.93) | 13 (0.33) |
| Yes, almost every day | 127 (0.70) | 1,986 (1.09) | 51 (1.30) |
| Yes, every day | 394 (2.17) | 18,786 (10.30) | 158 (4.03) |
| Missing | 9,321 (51.12) | - | - |
|
| |||
| Self-Harm | |||
| Have you ever deliberately attempted to injure yourself physically when you were angry or despondent? | |||
| Never | 7,345 (40.28) | 127,515 (69.93) | 2,895 (73.78) |
| Ever | 2,850 (15.63) | 54,825 (30.07) | 1,029 (26.22) |
| Missing | 8,039 (44.09) | - | - |
|
| |||
| Suicide Attempt | |||
| Have you ever deliberately attempted to kill yourself when you were angry or despondent? | |||
| Never | 9,578 (52.53) | 167,212 (91.70) | 3,740 (95.31) |
| Ever | 614 (3.37) | 15,128 (8.30) | 184 (4.69) |
| Missing | 8,042 (44.10) | - | - |
Note: Self-harm measured by the Lifetime History of Aggression questionnaire. Female and male refers to biological sex, rather than gender. Note that missing includes both those missing that item, as well as those missing from that particular wave of data collection.
a
Based on 18,234 unique individuals.
b
Based on 3,924 unique individuals.