Table 4.

Factors associated with CKD analyzed by logistic regression based on gender

Variable	Odds ratio (95% CI)	p value
Females
Hyperuricemia (1 = yes)	5.14 (1.39, 19.04)	0.01
Total cholesterol, 1 mmol/L	2.17 (1.32, 3.58)	< 0.01
Males
Hyperuricemia (1 = yes)	2.58 (1.57, 4.22)	< 0.01
Hypertension (1 = yes)	2.40 (1.48, 3.90)	< 0.01
Albumin, 1 g/L	0.90 (0.86, 0.93)	< 0.01

Abbreviations: CI confidence interval, CKD or non-CKD as dependent factor and age, duration of AS, HLA-B27 positivity, the presence of hyperuricemia, hypertension, diabetes or kidney stones, erythrocyte sedimentation rate, C-reactive protein, serum albumin, triglyceride, and total cholesterol as dependent factors