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Table 2 Association between each warning sign as well as laboratory parameters and black race

From: Dengue fever in Dar es Salaam, Tanzania: clinical features and outcome in populations of black and non-black racial category

  OR or coefficient (95% CI) P value OR or coefficient (95% CI) P value
Unadjusted Adjusted a
Warning signs at inclusion and within 7 days of follow-up 0.79 (0.52–1.2) 0.26 0.77 (0.49–1.2) 0.26
 Abdominal pain 1.2 (0.7–2.1) 0.42 1.2 (0.67–2.1) 0.56
 Persistent vomiting 1.1 (0.55–2.1) 1.0 0.95 (0.46–2.0) 0.90
 Clinical fluid accumulation 0.78 (0.11–5.6) 0.81 2.0 (0.19–20) 0.58
 Mucosal bleed 0.42 (0.21–0.84) 0.01 0.44 (0.21–0.92) 0.03
Laboratory parameters at inclusion c
 Hematocrit 0.97 (0.95–1.0) 0.06 −1.3 (−2.8–0.33) b 0.12
 Hematocrit > 45% 0.54 (0.35–0.82) 0.004 0.49 (0.31–0.78) b 0.003
 Platelets 1.0 (1.0–1.0) 0.73 4.1 (−9.8–18) 0.58
 Platelets < 100 × 109/L 1.9 (1.1–3.3) 0.02 1.8 (1.0–3.3) 0.05
  1. aAdjusted for age, malaria coinfection, secondary dengue and duration of symptoms at inclusion
  2. bAfter adjustment for hemoglobin result: hematocrit > 45%: 0.48 (0.30–0.76) p = 0.002; hematocrit value: − 1.2 (− 2.7–0.39) p = 0.14
  3. cBlood count values missing in 18 patients