Items		Normal weight (No, =40)		Under weight (No, =40)		Chi square Test
Items		No	%	No	%	x²	p value
Vit D Supply	No	8	20.0%	15	37.5%	2.990	0.084
Vit D Supply	Ok	32	80.0%	25	62.5%	2.990	0.084
Diatetic History	Breast milk feeding	24	60.0%	34	85.0%	6.270	0.012
Diatetic History	Milk formula feeding	16	40.0%	6	15.0%	6.270	0.012
Exposure to sun	Irregular exposure to sun	22	55.0%	23	57.5%	0.051	0.822
Exposure to sun	Regular exposure to sun	18	45.0%	17	42.5%	0.051	0.822