Effect of Admission Serum Calcium Levels and Length of Stay in Patients with Acute Pancreatitis: Data from the MIMIC-III Database
Table 2
Relative risk of having a hospital LOS of >2, >5, or >7 days was calculated according to the calcium level in different groups.
Characteristic
N
Univariate analysis
Model A
Model B
Model C
OR (95% CI)
value
aOR (95% CI)
value
aOR (95% CI)
value
aOR (95% CI)
value
LOS > 2 days
Calcium, mg/dL
<0.001
<0.001
<0.001
0.001
<8.5
1580
1.00(ref)
1.00(ref)
1.00(ref)
1.00(ref)
≥8.5
1576
0.619(0.496, 0.772)
<0.001
0.623(0.499, 0.778)
<0.001
0.612(0.490, 0.765)
<0.001
0.653(0.507, 0.842)
0.001
LOS > 5 days
Calcium, mg/dL
<0.001
<0.001
<0.001
<0.001
<8.5
1580
1.00(ref)
1.00(ref)
1.00(ref)
1.00(ref)
≥8.5
1576
0.522(0.453, 0.601)
<0.001
0.525(0.456, 0.606)
<0.001
0.518(0.448, 0.597)
<0.001
0.589(0.503, 0.689)
<0.001
LOS > 7 days
Calcium, mg/dL
<0.001
<0.001
<0.001
<0.001
<8.5
1580
1.00(ref)
1.00(ref)
1.00(ref)
1.00(ref)
≥8.5
1576
0.468(0.402, 0.545)
<0.001
0.468(0.402, 0.546)
<0.001
0.463(0.397, 0.541)
<0.001
0.515(0.437, 0.609)
<0.001
Adjusted covariates: model A: age, gender, race, marital status, insurance; model B: model A plus comorbidities; model: model B plus WBC, albumin, TBil, BUN, glucose, bicarbonate, sodium, and potassium. LOS : length of stay; CI: confidence interval; aOR: adjusted odds ratio; WBC : white blood cell count; TBil : total bilirubin; BUN : blood urea nitrogen. value <0.05 is shown in bold.
