Table 5 . Association between duration of bottle-feeding, nocturnal bottle-feeding and ECC.

	Caries free		Caries Affected		Total			P value
	Freq	(%)	Freq	(%)	Freq	(%)
Duration
<12	72	72.0	28	28.0	100	59.5		0.668
13 – 18	45	78.9	12	21.1	57	33.9
19-24	7	77.8	2	22.2	9	5.4
>24	1	50.0	1	50.0	2	1.2
Total	125	74.4	43	25.6	168	100.0
Night time bottle feeding
Yes	27	49.0	28	51.0	55	32.7	25.573	<0.001**
No	98	87.0	15	13.0	113	67.3
Total	125	74.0	43	26.0	168	100.0