Table 2 Detection of NSSI among LBC and NLBC

Total (N, %)

282(4.6)

359(3.3)

17.791

0.000

Gender(N, %)

 Boy

99(3.1)

1

126(2.2)

5.767

0.016

 Girl

183(6.4)

2.14 (1.67–2.75)**

233(4.5)

12.591

0.000

Learning stage (N, %)

 Primary school

55(2.2)

1

100(1.8)

1.629

0.202

 Junior middle school

122(5.6)

2.69 (1.95–3.72)**

172(4.4)

4.422

0.035

 Senior middle school

105(7.5)

3.65 (2.62–5.10)**

87(7.3)

0.040

0.841

Residence (N, %)

 County town

114(4.5)

1

228(3.1)

11.563

0.001

 Rural area

168(4.7)

1.04 (0.82–1.33)

131(3.9)

2.989

0.084

Boarder (N, %)

 No

169(3.9)

1

279(2.9)

9.990

0.002

 Yes

113(6.5)

1.71 (1.33–2.19)**

80(7.5)

1.119

0.290

Only child (N, %)

 No

231(4.5)

1

316(3.4)

11.949

0.001

 Yes

51(5.2)

0.34 (0.85–1.59)

43(3.1)

6.776

0.009

Family structure types (N, %)

 Nuclear families

184(3.8)

1

298(3.0)

6.223

0.013

 Single-parent families

62(7.5)

2.06 (1.53–2.78)**

26(5.0)

3.309

0.068

 Remarried families

36(8.3)

2.30 (1.58–3.34)**

25(6.4)

1.084

0.298