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Table 2 Association of smoking, being bullied, and suicidal behaviors in Chinese adolescents

From: Interaction of smoking and being bullied on suicidal behaviors: a school-based cross-sectional survey in China

Variable Suicidal ideation (n=4892) Suicidal plan (n=2493) Suicidal attempt (n=983)
n (%) Crude OR
(95% CI)
Adjusted OR (95% CI)a   n (%) Crude OR
(95% CI)
Adjusted OR (95% CI)a   n (%) Crude OR
(95% CI)
Adjusted OR (95% CI)a  
Smoking
 No 4671 (25.5) Ref Ref   2256 (12.3) Ref Ref   798 (4.4) Ref Ref  
 Yes 311 (53.7) 3.39 (2.87–4.00)*** 3.47 (2.91–4.12)***   237 (40.9) 4.94
(4.16–5.86)***
4.83 (4.03–5.78)***   185 (32.0) 10.31
(8.54–12.45)***
9.47 (7.74–11.59)***  
Being bullied
 No 3304 (22.0) Ref Ref   1531 (10.2) Ref Ref   552 (3.7) Ref Ref  
 Yes 1678 (43.1) 2.69 (2.49–2.89)*** 2.74 (2.54–2.96)***   962 (24.7) 2.89
(2.64–3.16)***
2.83 (2.58–3.11)***   431 (11.1) 3.26
(2.86–3.72)***
3.14 (2.74–3.60)***  
Smoking × being bullied     P*     P*     P*
 No × no 3142 (21.5) Ref Ref  < 0.001 1416 (9.7) Ref Ref  < 0.001 459(3.1) Ref Ref  < 0.001
 Yes × yes 149 (70) 6.67
(4.97–8.96)***
6.23 (4.60–8.43)*** 122 (57.3) 9.23
(7.01–12.14)***
8.17 (6.15–10.85)*** 92 (43.2) 15.19
(11.49–20.08)***
11.98 (8.92–16.09)***
  1. OR is odds ratio, CI is confidence interval; ***P < 0.001
  2. P* is value of interaction between smoking and being bullied on suicidal behaviors in multiplicative model
  3. a Adjusted for gender, grade, any siblings, residential background, accommodation type, father’s education level, mother’s education level, self-reported family economical, and number of friends