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. 2015 Mar 5;25(3):246–253. doi: 10.2188/jea.JE20140152

Table 2. Incidence density and hazard ratios of acute pancreatitis associated with pyogenic liver abscess.

	Non-pyogenic liver abscess				Pyogenic liver abscess				Crude HR (95% CI)	Adjusted HR^b (95% CI)

	n	Event	Person- years	Rate^a	n	Event	Person- years	Rate^a
All	123 464	705	593 588	1.19	30 866	550	119 242	4.61	3.84 (3.43, 4.29)	3.00 (2.62, 3.43)
Follow-up period
<3 months	123 464	21	30 423	0.69	30 866	96	7172	13.4	19.3 (12.0, 30.9)	14.7 (8.82, 24.6)
<6 months	119 887	48	59 953	0.80	27 269	141	13 757	10.3	7.48 (4.64, 12.0)	5.25 (3.02, 9.13)
<1 year	116 253	122	116 278	1.05	25 549	219	25 887	8.46	4.90 (3.56, 6.73)	3.87 (2.67, 5.62)
<2 years	109 021	253	217 908	1.16	23 031	319	46 943	6.80	3.69 (2.84, 4.79)	2.89 (2.12, 3.93)
<3 years	94 400	350	305 569	1.15	19 179	377	64 583	5.84	2.97 (2.15, 4.12)	2.31 (1.57, 3.41)
<4 years	80 990	426	380 125	1.12	16 091	429	79 219	5.42	3.49 (2.45, 4.96)	2.89 (1.89, 4.40)
<5 years	68 286	502	442 197	1.14	13 252	474	91 157	5.20	3.08 (2.13, 4.45)	2.15 (1.37, 3.36)

CI, confidence interval; HR, hazard ratio.

^aIncidence rate: per 1000 person-years.

^bAdjusted for age, diabetes mellitus, hypertriglyceridemia, biliary stone, alcoholism and hepatitis C.