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Table 3 Association between BMI and caries experience (DMFT) controlling for confounders using multilevel multiple linear regression analysis

From: Association between dental caries and obesity among Libyan schoolchildren during the armed conflict in Benghazi

 

Unconditional

Conditional 1

(with fixed effect factors)

B (95% CI); [p value]

Conditional 2

(with fixed effect factors)

B (95% CI); [p value]

Conditional 3

(with fixed effect factors)

B (95% CI); [p value]

Child factors

DMFT

–

 − 0.08(− 0.32, 0.17); [0.53]

–

 − 0.06 (− 0.30, 0.18); [0.62]

Gender:

Male versus female

–

0.89 (0.13, 1.67); [0.02*]

–

1.01 (0.25, 1.77); [0.01**]

Maternal education

Less than University VS University

–

0.06 (− 0.70, 0.83); [0.87]

–

 − 0.18 (− 0.96, 0.50); [0.64]

Sugary drinks

Infrequent versus frequent

–

0.83 (0.05, 1.61); [0.04*]

–

0.80 (0.03, 1.58); [0.04*]

School factors

School type

Public versus private

–

–

1.24 (0.43,2.05); [0.003**]

1.43 (0.52, 2.33); [0.002**]

 − 2LL

4731.6

4197.5

4722.6

4187.9

Covariance parameter: estimate (SE)

24.85 (1.25)

25.67 (1.38)

24.56 (1.24)

25.32 (1.36)

  1. *p ≤ 0.05, **p ≤ 0.01
  2. Conditional 1: including child level factors: DMFT and confounders (gender, maternal education and consumption of sugary drinks)
  3. Conditional 2: including only school level factors (public vs. private, as confounder)
  4. Conditional 3: including both child and school level factors