Table 1 Simultaneous complete comparison of groups by risk factors using multinomial regression
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Crude RRR
(large sample)
Crude RRR
(small sample)
Corrected RRR
(small sample)
Crude RRR
(large sample)
Crude RRR
(small sample)
Corrected RRR
(small sample)
Crude RRR
(large sample)
Crude RRR
(small sample)
Corrected RRR
(small sample)
Age (+15 years)0.96 (0.94, 0.98)0.92 (0.86, 0.99)0.93 (0.89, 0.98)1.00 (0.98, 1.02)0.99 (0.96, 1.01)1.00 (0.97, 1.04)1.04 (1.01, 1.07)1.07 (1.01, 1.13)1.08 (1.01, 1.14)
Female v. male1.28 (0.62, 2.62)2.28 (0.47, 11.0)3.06 (0.47, 11.0)1.07 (0.65, 1.79)1.96 (0.76, 5.02)2.00 (0.69, 5.77)0.84 (0.35, 2.03)0.86 (0.14, 5.33)0.65 (0.07, 5.95)
High BSIS score0.96 (0.87, 1.05)0.90 (0.77, 1.07)0.91 (0.76, 1.09)1.28 (1.22, 1.35)1.25 (1.16, 1.34)1.25 (1.15, 1.35)1.34 (1.21, 1.48)1.38 (1.15, 1.65)1.37 (1.13, 1.66)
Past self-harm1.00 (0.37, 2.64)0.88 (0.21, 3.67)0.86 (0.11, 7.00)1.35 (0.75, 2.44)1.75 (0.74, 4.13)2.77 (0.93, 8.20)1.36 (0.44, 4.21)2.00 (0.40, 9.95)3.23 (0.32, 32.3)
Psychiatric history0.78 (0.34, 1.80)1.13 (0.30, 4.27)1.31 (0.14, 12.4)1.11 (0.67, 1.84)1.07 (0.47, 2.52)0.60 (0.19, 1.87)1.42 (0.54, 3.77)0.95 (0.20, 4.43)0.46 (0.04, 5.56)
Married v. single1.31 (0.45, 3.86)4.64 (1.09, 19.7)5.66 (1.15, 27.7)2.31 (0.85, 0.55)1.99 (0.70, 5.63)3.10 (0.91, 10.6)1.76 (0.51, 6.08)0.43 (0.08, 2.32)0.55 (0.08, 3.88)
Divorced v. single0.61 (0.14, 2.69)1.27 (0.14, 11.8)1.16 (0.10, 13.8)1.42 (0.66, 3.06)1.46 (0.48, 4.44)1.01 (0.26, 3.90)2.34 (0.45, 12.2)1.14 (0.10, 13.4)0.87 (0.05, 14.0)
Substance use1.10 (0.62, 1.96)2.87 (1.68, 4.90)0.90 (0.33, 2.44)1.22 (0.39, 3.85)2.61 (1.21, 5.64)
Suicide in family1.43 (0.18, 11.3)0.66 (0.77, 5.68)1.02 (0.06, 15.9)0.20 (0.09, 0.44)0.20 (0.07, 0.56)0.20 (0.60, 0.74)0.14 (0.02, 1.21)0.30 (0.03, 2.92)0.20 (0.01, 3.79)
  • Numbers in parentheses are 95% CIs. RRR, relative risk ratio, the estimate analogous to relative risks created by multinomial regression. Age (+15 yrs), an increment of 15 years of age. High BSIS score, scores of 7+ v. scores of 0–6 on BSIS. Psychiatric history, previous contact with mental health service. Married v. single, married or cohabiting v. single. Divorced v. single, divorced, separated or widowed v. single.