Table 4. Odds Ratios and 95% confidence intervals of lower limb ischemia by cystatin C quartiles.

Cystatin C (mg/L)	OR (95% CI)	P	Adjusted OR (95% CI)*	P
≤0.8	1 (reference)	/	1 (reference)	/
0.8–1.0	2.355 (1.019−5.442)	0.045	1.271 (0.478–3.379)	0.631
1.0–1.2	6.155 (2.748−13.787)	<0.001	1.792 (0.683–4.702	0.236
>1.2	21.793 (10.046−47.280)	<0.001	3.395 (1.335–8.634)	0.010

CI, confidence interval.

^*Adjusting for sex, age, diabetes duration, hypertension, HbA1c and GA.