The impact of obesity on sepsis mortality: a retrospective review

BMC Infectious Diseases

Table 1 Variables by body mass index categories

Variable	All	Body mass index					P-value
Variable	All	Underweight	Normal weight	Overweight	Obese	Morbidly obese	P-value
Subjects, N (%)	792 (100)	49 (6)	261 (33)	249 (31)	187 (24)	46 (6)
Age +
Years	61.9 ± 17.2	60.3 ± 22.9	61.2 ± 19.2	64.2 ± 16.0	60.8 ± 14.2	60.2 ± 13.7	0.17
Gender *
Female	362 (46)	32	106	105	85	34	< 0.01
Male	430 (54)	17	155	144	102	12	< 0.01
Race *
White	726 (92)	43	247	221	174	41	0.03
Black	41 (5)	2	11	14	9	5
Other	24 (3)	4	3	13	4	0
Length of stay †
Days	9.1 ± 8.2	8.1 ± 7.2	9.3 ± 8.5	8.8 ± 7.8	9.0 ± 8.1	10.2 ± 9.6	0.64
APACHE II Score +
Points	15.5 ± 5.9	16.2 ± 6.6	15.4 ± 5.8	15.6 ± 5.8	15.9 ± 6.1	14.2 ± 5.6	0.42
Mortality ‡
Yes	129 (16)	12	46	40	25	6	0.06
No	663 (84)	37	215	209	162	40	0.06
Diabetes ‡
Yes	190 (24)	10	17	21	35	48	< 0.01
No	602 (76)	90	83	79	75	52	< 0.01
Cancer ‡
Yes	356 (45)	33	46	50	44	24	0.40
No	436 (55)	67	54	50	56	76	0.40
Neutropenia ‡
Yes	44 (6)	2	5	8	4	9	0.50
No	748 (94)	98	95	92	96	91	0.50
Liver ‡
Yes	43 (5)	4	5	6	4	9	0.61
No	749 (95)	96	95	94	96	91	0.61
Cardiovascular Disease ‡
Yes	188 (24)	24	21	24	25	28	0.33
No	604 (76)	76	79	76	75	72	0.33
COPD ‡
Yes	80 (10)	8	7	10	16	9	0.04
No	712 (90)	92	93	90	84	91	0.04
Renal ‡
Yes	30 (4)	4	6	3	2	4	0.14
No	762 (96)	96	94	97	98	96	0.14
Immunosuppression ‡
Yes	78 (10)	16	10	8	11	7	0.29
No	714 (90)	84	90	92	89	93	0.29

*Categorical data presented as N (%) or % and analyzed with Pearson Chi-square test (Exact test if necessary).
+Numeric data presented as Mean ± SD and analyzed with Analysis of Variance.
†Numeric data presented as Mean ± SD, log-transformed for analysis by Analysis of Variance.
‡Categorical data presented as N (%) or % and analyzed with Cochran-Armitage Trend test.

ISSN: 1471-2334