Table 4.

Association between duration of breastfeeding and dft score at 3 years of age (n = 486).

Duration	Full breastfeeding				Any breastfeeding
	n	Mean dft (SD) median (min–max)	Unadjusted RR (95% CI)	Adjusted RR† (95% CI)	n	Mean dft (SD) median (min–max)	Unadjusted (95% CI)	Adjusted RR‡ (95% CI)
< 6 months	219	3.9 (4.4)	1.0	1.0	205	3.9 (4.3)	1.0	1.0
		3 (0–20)				3 (0–20)
6–11 months	166	3.0 (4.1)	0.77 (0.61, 0.97)	0.88 (0.69, 1.11)	129	2.8 (4.1)	0.72 (0.56, 0.93)	0.76 (0.59, 0.99)
		2 (0–20)				1 (0–20)
12–17 months	75	2.7 (3.5)	0.69 (0.51, 0.93)	0.74 (0.54, 1.01)	64	2.8 (3.5)	0.72 (0.52, 0.99)	0.7 (0.50, 0.98)
		1 (0–13)				1.5 (0–13)
≥ 18 months	26	2.1 (2.8)	0.53 (0.33, 0.87)	0.63 (0.38, 1.06)	88	3.2 (3.9)	0.84 (0.63, 1.12)	0.96 (0.72, 1.30)
		0.5 (0–11)				2 (0–14)
p value		0.03 §				0.02 §

N, sample size; dft, decayed and filled teeth; SD, standard deviation; RR, relative risk; CI, confidence interval.

^†Adjusted for education of the main caregiver, frequency of sleeping while milk feeding at baseline, frequency of cleaning teeth at baseline, and sugar consumption between meals at 36 months.

^‡Adjusted for education of main caregiver, frequency of cleaning teeth at baseline, and sugar consumption between meals at 36 months.

^§Kruskal Wallis test.

Boldface indicates statistical significance.