Overweight and abdominal fat are associated with normal bone mineral density in patients with ulcerative colitis

Table 3 Prevalence and prevalence ratio of low bone mineral density according to demographic, clinical, and nutritional characteristics of patients with ulcerative colitis

Variable	Prevalence of low BMD, n (%)		PR (95%CI)	P value
Sex
Female	15	57.7	1.00
Male	13	31.0	1.86 (1.07 – 3.26)	0.029
Age group
< 45 yr	20	39.2	1.00
≥ 45 yr	8	47.1	1.38 (0.46 – 4.16)	0.583
Regular physical activity
Yes	3	18.8	1.00
No	25	48.1	2.56 (0.89 – 7.39)	0.081
Steroid use
No	23	38.3	1.00
Yes	5	62.5	1.63 (0.87 – 3.05)	0.126
Steroid use
< 3 mo	1	25.0	1.00
≥ 3 mo	5	62.5	2.50 (0.42 – 14.8)	0.313
BMI classification
Not overweight	23	51.1	1.00
Overweight	5	21.7	0.43 (0.19 – 0.97)	0.043
WC classification
Normal	21	52.5	1.00
Elevated	6	23.1	0.44 (0.21 – 0.94)	0.034
BF classification (%)
Normal	10	45.5	1.00
Elevated	18	39.1	0.86 (0.48 – 1.54)	0.614

PR: Prevalence ratio; CI: Confidence interval; BMI: Body mass index; WC: Waist circumference; BF: Body fat; BMD: Bone density; C-RP: C-reactive protein.