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. 2021 Dec 11;21:2249. doi: 10.1186/s12889-021-12367-3

Table 2.

Odds ratios for bullying witnessing

Bullying witnessing (never versus sometimes) Bullying witnessing (never versus often)
Odds Ratios S.E. 95% CI Odds Ratios S.E. 95% CI
Intercepts .29* .23 (.18, .46) .11* .35 (.06, .22)
Single child or not
 No .93 .06 (.89,1.12) 1.15 .09 (.92,1.35)
 Yes (reference)
Local residents or not
 No .99 .06 (.89, 1.12) .1.13 .09 (.93, 1.37)
 Yes (reference)
Family economic status
 Living in a rented house .94 .05 (.81,.1.09) .84 .12 (.66,1.07)
 Living in an owned house (reference)
Living arrangement
 Living with grandparents 1.35 .19 (.93, 1.96) .99 .28 (.56,1.74)
 Living with parents (reference)
Urban/rural hukou
 Rural 1.02 .07 (.88.1.16) 1.35* .12 (1.09,1.68)
 Urban (reference)
Parental education level
 Middle school or lower 1.08 .09 (.83,1.42) 1.20 .08 (.94, 1.41)
 Bachelor’s or higher (reference)
Maternal education level
 Middle school or lower .86 .08 (.72,1.02) .87 .02 (.66,1.15)
 Bachelor’s or higher (reference)

(1) bullying witnessing is coded as an ordinal categorical variable (never, sometimes, usually) and never group was chosen as the reference; (3) *p < 0.05, **p < 0.01; ***p < 0.001