Association of infant growth with emergence of permanent dentition among 12 year-aged southern Chinese school children

Table 5 Odds ratios for the occurrence of complete emerged permanent teeth until 12 years per unit increases in birth weight z-score and change in weight-for-age z-score at 0–3 months and 3–12 months

	Model 1^a	Model 2^b	Model 3^c
	OR (95% CI)	OR (95% CI)	OR (95% CI)
Birth weight z-score^d,e
Complete emerged	1.40 (1.14, 1.72)**	1.45 (1.17, 1.80)**	–
Change of weight-for-age z-score from birth to 3 months^d,f
Complete emerged	0.72 (0.58, 0.89)**	0.67 (0.54, 0.84)**	0.67 (0.54, 0.84)**
Change of weight-for-age z-score from 3 months to 12 months^d,e,f
Complete emerged	1.23 (0.94, 1.61)	1.23 (0.94, 1.63)	1.31 (0.98, 1.75)

^aModel 1: unadjusted
^bModel 2: adjusted for gestational age (as categorical variable), mode of delivery (natural labour, assisted natural labour, caesarean birth), type of feeding (never breastfed, exclusively breastfed 3 months or partially breastfed, exclusively breastfed for 3 months or more), health status (presence or absence of congenital conditions), highest parental education (≤9th, 10th -11th, ≥ 12th grade), and gender
^cModel 3: additionally adjusted for birth weight for age z-score (or baseline weight for the model looking at growth at 3–12 months)
^dAssociation with complete permanent tooth emergence at 12 years of age
^eOne unit change in birth weight z-score is equivalent to about 500 g in girls and 600 g in boys
^fOne unit change in weight z-score at 0–3 months and 3–12 months is equivalent to the distance between adjacent centile lines or 2nd centile, 50th centile, 84th centile, and 98th centile on standard growth charts
**p < 0.01

ISSN: 1472-6831