Skip to main content

Table 3 Risk factors of repeated self-harm by using negative binomial regression model a

From: A nationwide, population-based, long-term follow-up study of repeated self-harm in Taiwan

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  
  1. RR. relative risk, CI. confidence interval.
  2. aAll of the variables were significant (P < 0.05) in univariate analysis. The interaction between gender and methods was significant (P = 0.01).
  3. bAdjusted for environmental factors (season and area), hospital-related factors (levels of hospital, department, whether surgical procedures were employed, length of days, and medical expenditures), and length of follow-up time.
  4. cIncluding E953 (hanging), E954 (drowning), E955 (firearms), and E957 (jumping).