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Table 4 Significantly associated laboratory variables at 24 h prior to ICU requirement compared to first presentation of dengue-infected ICU (cases) patients

From: Early clinical and laboratory risk factors of intensive care unit requirement during 2004–2008 dengue epidemics in Singapore: a matched case–control study

Variables

Den-infected ICU at presentation (n = 23)^

(IQR)

Den-infected ICU at 24 H prior ICU (n = 23)^

(IQR)

COR

P-value

95% CI

Systolic blood pressure

110

(91.5–118.5)

90

(80–101.5)

0.96

0.03

0.92–0.996

Pulse rate

95.5

(88.5–102)

101

(90.5–117.5)

1.07

0.044

1.002–1.14

White cell count

3.3

(2.4–4.2)

4.9

(3–7.4)

1.59

0.033

1.04–2.44

Proportion lymphocytes

16.5

(9.8–19.9)

23.5

(18.1–28.6)

1.19

0.020

1.03–1.38

Proportion monocytes

7.9

(5.1–9.9)

12.1

(9.1–17.9)

1.35

0.033

1.02–1.78

Serum hematocrit

44.9

(42.8–47.2)

40.2

(33.6–43.6)

0.81

0.037

0.66–0.99

  1. COR- Conditional Odds Ratio; IQR- Interquartile range.
  2. ^- Four cases were excluded as they were admitted into ICU less than 24 hours after first presentation at hospital. Data in bold are risk factors involved in the most optimal predictive model of ICU requirement at 24h prior to ICU requirement.