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Table 3 The generalized linear mixed model of gingival bleeding

From: Related factors of periodontal health among Chinese middle school students, findings from a national cross-sectional survey

  Coefficient Sig. Exp (coefficient) 95% CI for exp (coefficient)
Lower Upper
Intercept 0.87   2.39 1.52 3.75
Gender
 Male 0.11 < 0.001 1.12   
 Femalea     1.09 1.15
Age
 12 − 0.35 < 0.001 0.70 0.67 0.73
 13 − 0.26 < 0.001 0.77 0.74 0.80
 14 -0.22 < 0.001 0.80   
 15a     0.77 0.83
Living place
 Urban 0.18 < 0.001 1.20   
 Rurala     1.16 1.23
Ethnic group
 Han − 0.08 .003 0.92 0.87 0.97
 Minority      
Father education
 Middle school 0.18 < 0.001 1.20 1.140 1.26
 High school 0.12 < 0.001 1.14 1.09 1.18
 Universitya      
Brush teeth
 Yes − 0.29 < 0.001 0.75 0.71 0.79
 Noa      
Dental floss
 Yes − 0.20 < 0.001 0.82 0.78 0.86
 Noa      
Oral health knowledge
 0–3 0.09 .002 1.09 1.05 1.13
 4–5 0.06 .001 1.06   
 6–8a     1.03 1.10
  1. aReference category