Table 4. Hazard Ratios For Death According to Interval Between IDA and Colon Cancer Diagnosis, Adjusted For Covariates^* Using A Cox Proportional Hazards Model.

Variable		Hazard ratio	95% CI		p-value
			Lower	Upper
Stage I/II (n = 287)
Interval from IDA to colon cancer diagnosis (days)	0–30	1.00	–	–
	31–90	1.16	0.67	2.01	0.60
	≥91	1.52	1.05	2.20	0.03
Stage III/IV (n = 728)
Interval from IDA to colon cancer diagnosis (days)	0–30	1.00	–	–
	31–90	1.35	1.03	1.76	0.03
	≥91	1.22	1.00	1.49	0.05
All stages (n = 1015)
Interval from IDA to colon cancer diagnosis (days)	0–30	1.00	–	–
	31–90	1.26	0.99	1.59	0.06
	≥91	1.28	1.07	1.53	0.01

IDA: iron deficiency anemia; CI: confidence interval.

^*Age, gender, hypertension, diabetes mellitus, hyperlipidemia, cardiovascular disease, and chronic kidney disease.