Table 2.

Adjusted hazard ratios for AAA.

RDW	Person years	Incident	Crude HR (95%CI)	Model 1 HR(95%CI)	Model 2 HR(95%CI)	Model 3 HR(95%CI)
Total AAA
Quartile 1	142437	83	Ref	Ref	Ref	Ref
Quartile 2	139988	111	1.38(1.04,1.83)	1.39(1.05,1.85)	1.21(0.91,1.61)	1.23(0.92,1.64)
Quartile 3	134628	131	1.71(1.30,2.26)	1.75(1.33,2.31)	1.38(1.04,1.83)	1.40(1.06,1.86)
Quartile 4	122294	166	2.46(1.89,3.20)	2.45(1.88,3.20)	1.58(1.19,2.09)	1.61(1.20,2.12)
P for trend			<0.001	<0.001	0.001	0.001
Surgically treated or ruptured AAA
Quartile 1	142437	37	Ref	Ref	Ref	Ref
Quartile 2	139988	55	1.52(1.00,2.31)	1.58(1.04,2.40)	1.33(0.87,2.02)	1.35(0.89,2.06)
Quartile 3	134628	53	1.53(1.01,2.33)	1.64(1.07,2.51)	1.22(0.79,1.88)	1.24(0.81,1.91)
Quartile 4	122294	76	2.46(1.66,3.65)	2.59(1.74,3.87)	1.57(1.03,2.39)	1.58(1.04,2.41)
P for trend			<0.001	<0.001	0.062	0.059
Non-surgically treated and non-ruptured AAA
Quartile 1	142437	46	Ref	Ref	Ref	Ref
Quartile 2	139988	56	1.26(0.86,1.87)	1.25(0.84,1.85)	1.11(0.75,1.65)	1.13(0.76,1.67)
Quartile 3	134628	78	1.86(1.29,2.68)	1.84(1.27,2.65)	1.52(1.04,2.21)	1.54(1.06,2.24)
Quartile 4	122294	90	2.45(1.72,3.49)	2.35(1.64,3.37)	1.59(1.08,2.32)	1.60(1.09,2.35)
P for trend			<0.001	<0.001	0.006	0.005

Model 1: age, sex adjusted.

Model 2: Model 1 + smoking + diabetes + CHD + waist circumference + systolic blood pressure + ApoB/ApoA1 ratio + WBC + hemoglobin + MCV (classified by <80fl, 80–100fl and >100fl).

Model 3: Model 2 + anti-hypertension medications + lipid-lowing medication.