Obesity and Overweight Are Independently Associated with Greater Survival in Critically Ill Diabetic Patients: A Retrospective Cohort Study
Table 4
Adjusted HRs (95%CIs)† of 30-day and 90-day mortality by BMI category within different subgroups.
Subgroups
BMI category of 30-day mortality
BMI category of 90-day mortality
Normal weight
Overweight
Obesity
Normal weight
Overweight
Obesity
Admission type
Emergency
4783
1.00
0.71 (0.58, 0.86)
0.67 (0.55, 0.82)
1.00
0.75 (0.63, 0.88)
0.65 (0.55, 0.77)
Elective
1131
1.00
0.64 (0.26, 1.55)
0.51 (0.21, 1.25)
1.00
0.65 (0.32, 1.32)
0.51 (0.25, 1.05)
Urgent
194
1.00
1.15 (0.37, 3.62)
0.62 (0.15, 2.54)
1.00
0.76 (0.31, 1.86)
0.50 (0.18, 1.40)
ICU type
MICU
1810
1.00
1.03 (0.77, 1.38)
0.74 (0.56, 0.98)
1.00
0.95 (0.75, 1.22)
0.66 (0.52, 0.84)
CCU
1173
1.00
0.58 (0.38, 0.89)
0.70 (0.46, 1.05)
1.00
0.59 (0.42, 0.84)
0.72 (0.51, 1.01)
CSRU
1997
1.00
0.71 (0.34, 1.47)
1.18 (0.62, 2.28)
1.00
0.65 (0.39, 1.08)
0.82 (0.51, 1.34)
SICU
734
1.00
0.53 (0.33, 0.85)
0.34 (0.21, 0.57)
1.00
0.72 (0.49, 1.05)
0.39 (0.26, 0.59)
TSICU
394
1.00
0.48 (0.24, 0.96)
0.45 (0.22, 0.91)
1.00
0.72 (0.41, 1.27)
0.53 (0.28, 0.97)
DM
T1DM
488
1.00
0.44 (0.19, 1.02)
0.43 (0.17, 1.06)
1.00
0.64 (0.33, 1.27)
0.49 (0.22, 1.05)
T2DM
5620
1.00
0.69 (0.57, 0.85)
0.63 (0.52, 0.77)
1.00
0.71 (0.61, 0.84)
0.61 (0.52, 0.72)
AMI
No
4900
1.00
0.73 (0.58, 0.91)
0.65 (0.52, 0.80)
1.00
0.79 (0.66, 0.95)
0.63 (0.52, 0.75)
Yes
1208
1.00
0.57 (0.38, 0.86)
0.60 (0.40, 0.89)
1.00
0.52 (0.37, 0.73)
0.60 (0.43, 0.84)
Stroke
No
5946
1.00
0.69 (0.57, 0.85)
0.65 (0.54, 0.79)
1.00
0.73 (0.62, 0.86)
0.63 (0.52, 0.75)
Yes
162
1.00
0.74 (0.31, 1.76)
0.43 (0.18, 1.05)
1.00
0.83 (0.40, 1.71)
0.46 (0.22, 0.98)
Renal failure
No
4033
1.00
0.60 (0.45, 0.80)
0.47 (0.35, 0.64)
1.00
0.59 (0.47, 0.75)
0.45 (0.35, 0.57)
Yes
2075
1.00
0.75 (0.58, 0.97)
0.71 (0.55, 0.90)
1.00
0.81 (0.65,1.00)
0.70 (0.57, 0.86)
Respiratory failure
No
4988
1.00
0.68 (0.53, 0.88)
0.57 (0.44, 0.73)
1.00
0.69 (0.56, 0.84)
0.55 (0.44, 0.67)
Yes
1120
1.00
0.82 (0.61, 1.11)
0.66 (0.50, 0.88)
1.00
0.92 (0.70, 1.19)
0.67 (0.52, 0.86)
Heart failure
No
3738
1.00
0.56 (0.42, 0.73)
0.57 (0.44, 0.73)
1.00
0.61 (0.49, 0.76)
0.57 (0.45, 0.71)
Yes
2370
1.00
0.85 (0.64, 1.12)
0.70 (0.53, 0.92)
1.00
0.85 (0.68, 1.06)
0.65 (0.52, 0.82)
Malignancy
No
5925
1.00
0.69 (0.56, 0.85)
0.68 (0.56, 0.83)
1.00
0.73 (0.62, 0.87)
0.66 (0.56, 0.78)
Yes
183
1.00
0.81 (0.46, 1.42)
0.48 (0.25, 0.91)
1.00
0.71 (0.44, 1.16)
0.46 (0.27, 0.78)
Abbreviations: HR: hazard ratio; CI: confidence interval; BMI: body mass index; ICU: intensive care unit; MICU: medical intensive care unit; CCU: coronary care unit; CSRU: cardiac surgery recovery unit; SICU: surgical intensive care unit; TSICU: thoracic surgery intensive care unit; DM: diabetic mellitus; AMI: acute myocardial infarction. †HRs were adjusted for age, gender, and ethnicity. Normal weight category acts as the reference group.
