Table 2 Bivariate and multi-variate analysis of new caries development and socio-demographic variables including oral health related knowledge, snacking pattern and OHI-S according to the negative binomial regression analysis
n (%) | IRR | p value | IRR | p value | |
|---|---|---|---|---|---|
Gender | |||||
Boy | 109 (40.2) | 1.06 (0.70–1.61) | 0.77 | ||
Girl | 162 (59.8) | 1 | |||
Father’s education | |||||
Illiterate/elementary school/middle school (0–8 years of education) | 50 (18.5) | 1.33 (0.91–1.95) | 0.14 | ||
High school or diploma (9–12 years of education) | 90 (33.2) | 1.15 (0.82–1.61) | 0.41 | ||
Associate/bachelor/master of science/doctorate (> 12 years of education) | 131 (48.3) | 1 | |||
Mother’s education | |||||
Illiterate/elementary school/middle school (0–8 years of education) | 38 (14) | 1.34 (0.87–2.06) | 0.19 | 1.22 (0.79–1.90) | 0.38 |
High school or diploma (9–12 years of education) | 122 (45) | 1.58 (1.11–2.52) | 0.01 | 1.47 (1.02–2.12) | 0.04 |
Associate/bachelor/master of science/doctorate (> 12 years of education) | 111(41) | 1 | 1 | ||
Child birth order | |||||
2nd or more | 114 (42.1) | 1.04 (0.83–1.31) | 0.74 | ||
1st child or single | 157 (57.9) | 1 | |||
Housing area (per person) | |||||
< 20 m2 | 117 (43.2) | 0.93 (0.71–1.21) | 0.58 | ||
≥ 20 m2 | 154 (56.8) | 1 | |||
Living district | |||||
Non-affluent | 168 (62) | 2.06 (1.42–2.99) | < 0.001 | 1.86 (1.27–2.73) | < 0.001 |
Affluent | 103 (38) | 1 | 1 | ||
Oral health knowledge | |||||
0–8 correct answers | 227 (83.8) | 1.42 (0.95–2.13) | 0.09 | ||
9 correct answers | 44 (16.2) | 1 | |||
Sugary snack intake per day | |||||
Two or more than two sugary snack/day | 103 (38) | 0.96 (0.73–1.27) | 0.80 | ||
Less than two sugary snack/day | 168 (62) | 1 | |||
OHI-S | |||||
OHI-S | 271 (100) | 0.98 (0.72–1.33) | 0.90 | ||