Background
Methods
Data source
Variable definitions
Statistical analysis
Results
Characteristics of study sample
Repetition Characteristics | No | One or more | Total | |||
---|---|---|---|---|---|---|
N | (%) | N | (%) | N | (%) | |
Gender | ||||||
Male | 16,892 | (46.30) | 1,492 | (44.04) | 18,384 | (46.10) |
Female | 19,595 | (53.70) | 1,896 | (55.96) | 21,491 | (53.90) |
Age group (years) | ||||||
<25 | 6,725 | (18.43) | 532 | (15.70) | 7,257 | (18.20) |
25-44 | 16,222 | (44.46) | 1,683 | (49.68) | 17,905 | (44.90) |
45-64 | 7,944 | (21.77) | 729 | (21.52) | 8,673 | (21.75) |
≧65 | 5,596 | (15.34) | 444 | (13.11) | 6,040 | (15.15) |
Methods | ||||||
E950 solid or liquid | 23,767 | (65.14) | 2,298 | (67.83) | 26,065 | (65.37) |
E951 gases in domestic use | 169 | (0.46) | 10 | (0.30) | 179 | (0.45) |
E952 other gases or vapors | 2,917 | (7.99) | 310 | (9.15) | 3,227 | (8.09) |
E953 hanging | 660 | (1.81) | 50 | (1.48) | 710 | (1.78) |
E954 drowning | 226 | (0.62) | 22 | (0.65) | 248 | (0.62) |
E955 firearms | 67 | (0.18) | 8 | (0.24) | 75 | (0.19) |
E956 cutting and piercing | 6,463 | (17.71) | 455 | (13.43) | 6,918 | (17.35) |
E957 jumping | 717 | (1.97) | 106 | (3.13) | 823 | (2.06) |
E958 other means | 1,501 | (4.11) | 129 | (3.81) | 1,630 | (4.09) |
Low-income family | ||||||
Yes | 706 | (1.93) | 150 | (4.43) | 856 | (2.15) |
No | 35,781 | (98.07) | 3,238 | (95.57) | 39,019 | (97.85) |
Catastrophic illness | ||||||
Yes | 2,734 | (7.49) | 673 | (19.86) | 3,407 | (8.54) |
No | 33,753 | (92.51) | 2,715 | (80.14) | 36,468 | (91.46) |
Psychiatric disorders | ||||||
Yes | 14,690 | (40.26) | 1,881 | (55.52) | 16,571 | (41.56) |
No | 21,797 | (59.74) | 1,507 | (44.48) | 23,304 | (58.44) |
Total | 36,487 | 3,388 | 39,875 |
Cumulative risk of repeated self-harm
Time of repeated self-harm | Based on individuals | Based on episodes | Cumulative risk |
---|---|---|---|
Tracked after 3 months | |||
Events | 2,802 | 5,272 | 2,802 |
Risk % (95% CI) | 7.19 (6.93–7.45) | 7.23 (6.48–7.57) | 7.19 (6.93–7.45) |
Tracked after 6 months | |||
Events | 225 | 1,479 | 3,027 |
Risk % (95% CI) | 0.58 (0.50–0.66) | 1.24 (1.13–1.35) | 7.77 (7.50–8.08) |
Tracked after 1 year | |||
Events | 90 | 190 | 3,117 |
Risk % (95% CI) | 0.23 (0.18–0.28) | 0.49 (0.42–0.56) | 8.00 (7.73–8.60) |
Tracked after 2 years | |||
Events | 98 | 220 | 3,215 |
Risk % (95% CI) | 0.25 (0.20–0.30) | 0.57 (0.50–0.65) | 8.25 (7.97–9.20) |
Tracked after 3 years | |||
Events | 75 | 175 | 3,290 |
Risk % (95% CI) | 0.19 (0.15–0.24) | 0.45 (0.39–0.52) | 8.44 (8.16–9.68) |
Tracked after 4 years | |||
Events | 30 | 62 | 3,320 |
Risk % (95% CI) | 0.08 (0.05–0.11) | 0.16 (0.12–0.20) | 8.52 (8.24–9.85) |
Tracked after 5 years | |||
Events | 30 | 92 | 3,350 |
Risk % (95% CI) | 0.08 (0.05–0.11) | 0.24 (0.19–0.29) | 8.60 (8.32–10.10) |
Tracked after 6 years | |||
Events | 24 | 68 | 3,374 |
Risk % (95% CI) | 0.06 (0.04–0.09) | 0.18 (0.14–0.22) | 8.66 (8.38–10.28) |
Tracked after 7 years | |||
Events | 11 | 24 | 3,385 |
Risk % (95% CI) | 0.03 (0.01–0.05) | 0.06 (0.04–0.09) | 8.69 (8.41–10.35) |
Tracked after 8 years | |||
Events | 3 | 6 | 3,388 |
Risk % (95% CI) | 0.01 (0.01–0.02) | 0.02 (0.01–0.03) | 8.70 (8.42–10.37) |
Risk factors of repeated self-harm
Model Characteristics | Total (N = 39,875) | Female (N = 21,491) | Male (N = 18,384) | |||
---|---|---|---|---|---|---|
Adjusted RRb (95% CI) | P | Adjusted RRb (95% CI) | P | Adjusted RRb (95% CI) | P | |
Gender | ||||||
Male | Reference | |||||
Female | 1.21 (1.15–1.76) | 0.04 | ||||
Age group (years) | ||||||
<25 | Reference | Reference | Reference | |||
25–44 | 0.83 (0.72–1.26) | 0.16 | 0.94 (0.92–1.33) | 0.06 | 0.79 (0.63–1.29) | 0.29 |
45–64 | 0.86 (0.75–1.08) | 0.12 | 0.90 (0.76–1.06) | 0.21 | 0.80 (0.66–1.69) | 0.33 |
≧65 | 0.63 (0.54–1.73) | 0.33 | 0.96 (0.46–1.70) | 0.33 | 0.56 (0.52–1.45) | 0.43 |
Methods | ||||||
Violent methods c
| Reference | Reference | Reference | |||
E950 solid or liquid | 1.88 (1.23–2.04) | <0.01 | 2.02 (1.29–2.18) | <0.01 | 1.76 (1.58–2.83) | <0.01 |
E951 gases in domestic use | 1.56 (0.81–1.97) | 0.24 | 1.86 (0.76–2.13) | 0.39 | 1.36 (0.89–2.01) | 0.20 |
E952 other gases or vapors | 1.80 (0.76–2.09) | 0.16 | 2.24 (0.88–3.04) | 0.34 | 1.66 (0.95–2.29) | 0.06 |
E956 cutting and piercing | 1.36 (1.02–1.82) | 0.03 | 1.38 (1.02–1.83) | 0.02 | 1.26 (0.69–1.51) | 0.17 |
E958 other means | 0.84 (0.66–1.40) | 0.44 | 0.85 (0.54–1.54) | 0.54 | 0.81 (0.64–1.34) | 0.43 |
Low-income family | ||||||
Yes | 1.86 (0.91–2.28) | 0.25 | 2.12 (0.62–2.77) | 0.68 | 1.55 (0.82–2.13) | 0.23 |
No | Reference | Reference | Reference | |||
Catastrophic illness | ||||||
Yes | 1.10 (0.97–1.25) | 0.14 | 1.21 (0.82–1.44) | 0.07 | 0.97 (0.80–1.18) | 0.76 |
No | Reference | Reference | Reference | |||
Psychiatric disorders | ||||||
Yes | 1.61 (1.48–1.75) | <0.01 | 1.70 (1.52–1.90) | <0.01 | 1.49 (1.31–1.69) | <0.01 |
No | Reference | Reference | Reference |
Methods of repeated self-harm | Female | Male | Total | |||
---|---|---|---|---|---|---|
N | (%) | N | (%) | N | (%) | |
E950 solid or liquid | 1,334 | (70.36) | 964 | (64.61) | 2,298 | (67.83) |
E951 gases in domestic use | 6 | (0.32) | 4 | (0.27) | 10 | (0.30) |
E952 other gases or vapors | 164 | (8.65) | 146 | (9.79) | 310 | (9.15) |
E953 hanging | 30 | (1.58) | 20 | (1.34) | 50 | (1.48) |
E954 drowning | 12 | (0.63) | 10 | (0.67) | 22 | (0.65) |
E955 firearms | 5 | (0.26) | 3 | (0.20) | 8 | (0.24) |
E956 cutting and piercing | 340 | (17.93) | 115 | (7.71) | 455 | (13.43) |
E957 jumping | 60 | (3.16) | 46 | (3.08) | 106 | (3.13) |
E958 other means | 45 | (2.37) | 84 | (5.63) | 129 | (3.81) |
Total | 1,896 | 1,492 | 3,388 |