Association of Total Fluid Intake and Output with Duration of Hospital Stay in Patients with Acute Pancreatitis
Table 3
Associations between baseline patient characteristics and length of hospital stay.
Variable
Multiplicative effect on mean LOS (95% CI)
value
Age at hospital admission (10-year increase)
1.00 (0.98, 1.01)
0.61
Sex (female)
1.29 (0.79, 2.11)
0.30
Primary etiology
Test of overall difference:
ETOH
1.00 (reference)
N/A
Biliary
0.95 (0.52, 1.73)
0.88
Other
2.07 (1.17, 3.66)
0.012
Any antihypertensive medication at the time of hospital admission
0.85 (0.49, 1.48)
0.57
BMI (5-unit increase)
1.17 (0.93, 1.47)
0.17
Heart rate (10-unit increase)
1.19 (1.08, 1.32)
0.0005
Respiratory rate (10-unit increase)
1.91 (1.36, 2.69)
0.0002
Systolic blood pressure (10-unit increase)
0.86 (0.79, 0.92)
<0.0001
Diastolic blood pressure (10-unit increase)
0.86 (0.76, 0.96)
0.0102
Oxygen saturation (5-unit increase)
0.98 (0.66, 1.44)
0.92
BISAP score
Test of overall difference:
0
1.00 (reference)
N/A
1
1.42 (0.77, 2.61)
0.26
2–4
3.11 (1.83, 5.30)
<0.0001
Hematocrit (10-unit increase)
0.53 (0.37, 0.76)
0.0005
Hemoglobin (1-unit increase)
0.87 (0.79, 0.95)
0.0028
Sodium (5-unit increase)
0.69 (0.54, 0.88)
0.0032
Potassium (1-unit increase)
1.13 (0.89, 1.43)
0.32
Calcium (1-unit increase)
0.77 (0.65, 0.92)
0.0040
Bicarbonate (5-unit increase)
0.55 (0.42, 0.72)
<0.0001
Creatinine (doubling)
1.73 (1.36, 2.19)
<0.0001
BUN (doubling)
1.76 (1.41, 2.21)
<0.0001
Triglycerides (doubling)
1.25 (1.04, 1.49)
0.0177
LOS = length of stay; CI = confidence interval. Multiplicative effects, 95% CIs, and values result from single-variable (i.e., unadjusted) negative binomial regression models.
