TABLE 4.

Association between four ferritin levels and mortality in MIMIC III (Cox regression).

Model	Mortality	Ferritin (ng/mL)
		<70 N = 208	≥70 and <500 N = 1007	≥500 and <1000 N = 332	≥1000 N = 192
Non-adjusted HR (95% CI) p-value	28 days	01.03 (0.70–1.53) 0.878	Ref.	1.07 (0.78–1.48) 0.658	1.73(1.24–2.42) 0.001
	90 days	0.84 (0.61–1.15) 0.281	Ref.	1.11 (0.87–1.40) 0.401	1.65(1.27–2.13) 0.000
Model 1 HR (95% CI) p-value	28 days	1.16 (0.78–1.73) 0.457	Ref.	1.07 (0.77–1.49) 0.668	1.71(1.22–2.41) 0.002
	90 days	0.94 (0.68–1.29) 0.701	Ref.	1.09 (0.86–1.39) 0.475	1.64(1.26–2.14) 0.000
Model 2 HR (95% CI) p-value	28 days	1.16 (0.78–1.72) 0.474	Ref.	1.07 (0.77–1.48) 0.699	1.76(1.25–2.47) 0.001
	90 days	0.94 (0.68–1.29) 0.692	Ref.	1.08 (0.85–1.38) 0.516	1.67(1.28–2.18) 0.000
Model 3 HR (95% CI) p-value	28 days	1.16 (0.77–1.74) 0.473	Ref.	1.00 (0.72–1.40) 0.980	1.70(1.19–2.43) 0.003
	90 days	0.97 (0.70–1.34) 0.852	Ref.	1.00 (0.78–1.28) 0.986	1.55(1.18–2.03) 0.002