Table 1.

Demographic characteristics of the study subjects.

Variables	N	n	Prevalence (%)	Pa	OR (95% CI)	Pb
Hospital classification				0.053
Tertiary grade A	274	38	13.9		Ref.
Tertiary grade B	100	19	19.0		1.457 (0.795–2.670)	0.223
Secondary grade	157	36	22.9		1.848 (1.114–3.064)	0.017
Gender				0.656
Female	228	38	16.7		Ref.
Male	303	55	18.2		1.109 (0.704–1.747)	0.656
Age (years)				0.034
15–64	157	19	12.1		Ref.
≥65	374	74	19.8		1.792 (1.041–3.083)	0.034
Body mass index				0.169
18.5–23.9	123	24	19.5		Ref.
<18.5	31	12	38.7		2.605 (1.114–6.091)	0.027
24–28	62	15	24.2		1.316 (0.633–2.739)	0.462
>28	19	4	21.0		1.100 (0.335–3.615)	0.875

OR, odds ratio; CI, confidence interval; Ref., reference.

P^a, Comparison among all the subgroups; P^b, Comparison with the reference subgroup; numbers in bold indicate statistical significance.