	Male				Female
Group of body fat percentage	n	BMD (db/MHz)	Number of OPs (% in group)	OP of total males (%)	n	BMD (db/MHz)	Number of OPs (% in group)	OP of total females (%)
Low	85	57.47 ± 9.31	32 (37.60)	10.67	94	52.52 ± 7.45^**	73 (77.70)	15.47
Normal	178	59.74 ± 8.65	43 (24.20)	14.33	322	55.06 ± 8.29	200 (62.10)	42.37
High	37	60.75 ± 8.95	8 (21.60)	2.7	56	56.61 ± 7.91^**	30 (53.60)	3.36
		F = 2.496 P = 0.084		χ² = 7.410		F = 5.291, P = 0.005		χ² = 10.857
		F = 2.496 P = 0.084		P = 0.116		F = 5.291, P = 0.005		P = 0.028