Table 2.

Frequency of osteoporosis-related symptoms and self-assessment of health (Chi-2 Test).

Used Dietary Supplements	How Do You Assess Your Knowledge about Osteoporosis?				In Total		Chi-2 Test
	(Very) Good		Negligible/Lack
	N	%	N	%	N	%	Chi-2	p<
Vitamin D	127	86.4%	93	56.4%	220	70.5%	33.720	0.001
Magnesium	78	53.1%	40	24.2%	118	37.8%	27.455	0.001
Calcium and phosphorus preparations	125	85.0%	97	58.8%	222	71.2%	26.091	0.001
Vitamin A	30	20.4%	11	6.7%	41	13.1%	12.861	0.001
Vitamin K	37	25.2%	13	7.9%	50	16.0%	17.272	0.001
Vitamin C	68	46.3%	40	24.2%	108	34.6%	16.649	0.001
Calcitonin	34	23.1%	13	7.9%	47	15.1%	14.131	0.001
Estrogen	16	10.9%	4	2.4%	20	6.4%	9.275	0.001

N, number.