Table 8 Logistic regression analysis of associated factors related to periodontal health status among a sample of 12–15 years old in Gansu province of China

Gender

 Female

0.164

0.071

5.289

1.178 (1.025–1.355)

0.021

 Male

–

–

–

–

–

District

 Rural

0.275

0.073

14.179

1.316 (1.141–1.519)

 < 0.001

 Urban

–

–

–

–

–

Age (years)

 12

0.347

0.103

11.355

1.414 (1.156–1.730)

0.001

 13

0.189

0.103

3.345

1.207 (0.987–1.478)

0.067

 14

0.292

0.102

8.236

1.339 (1.097–1.635)

0.004

 15

–

–

–

–

–

Oral health knowledge

 Excellent

0.320

0.269

1.410

1.377 (0.812–2.335)

0.235

 Good

0.136

0.263

0.267

1.146 (0.684–1.920)

0.605

 Average

− 0.106

0.274

0.149

0.900 (0.526–1.538)

0.700

 Poor

–

–

–

–

–