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Table 3 Rate ratio of decayed permanent teeth in 12–17 year olds and TV, by age, sex, ethnicity and diet

From: The association between dental caries and television viewing among Chinese adolescents in Guangxi, China

 

Model 1

Model 2

Rate ratio

Rate ratio

Age (reference: 12 years)

Age 14 years

1.11 (0.98, 1.27)

1.09 (0.96, 1.24)

 

Age 17 years

1.28*** (1.12, 1.45)

1.27*** (1.12, 1.45)

Sex (female)

1.40*** (1.26, 1.56)

1.42*** (1.28, 1.57)

City (rural)

1.49*** (1.33, 1.66)

1.47*** (1.31, 1.65)

Ethnicity: (reference: Han)

Ethnicity Zhuang

1.61*** (1.44, 1.80)

1.60*** (1.43, 1.78)

 

Ethnicity Yao

0.32*** (0.27, 0.39)

0.31*** (0.26, 0.38)

TV (reference: <30 minutes/day)

30-60 minutes

1.04 (0.90, 1.19)

1.04 (0.91, 1.20)

 

60-120 minutes

1.24** (1.07, 1.43)

1.24** (1.07, 1.43)

 

120-180 minutes

1.26* (1.04, 1.52)

1.26* (1.04, 1.52)

 

>180 minutes

1.26* (1.04, 1.54)

1.26* (1.04, 1.54)

Drink milk (reference: never)

Sometimes

 

0.91 (0.77, 1.07)

 

Every day

 

0.94 (0.77, 1.17)

 

Twice a day

 

0.84 (0.64, 1.12)

Breakfast (Have breakfast most days)

 

0.87 (0.75, 1.03)

  1. Model 1 adjusted for age, sex, area of residence (rural/ urban), Ethnicity, TV viewing. Model 2 additionally adjusted for eating breakfast regularly, and frequency of drinking milk. *** p < 0.001, ** p < 0.01, * p < 0.05.
  2. For Model 1: log likelihood chi-square: 334.19, Prob > chi-square:<0.001, Pseudo R-square: 0.0289.
  3. For Model 2: log likelihood chi-square: 338.70, Prob > chi-square:<0.001, Pseudo R-square: 0.0293.