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Table 3 The association between laboratory results and 90-day mortality in older patients visiting the ED

From: Prediction of 90-day mortality in older patients after discharge from an emergency department: a retrospective follow-up study

  

Univariate Cox regression analysis

Eventsa (Total)

HR (95 % CI)

P-value

Haemoglobin

 Within reference range (male: 8.5-11.0 mmol/L, female: 7.5-10.0 mmol/L)

147 (1458)

ref

ref

 Below reference range

158 (965)

1.66 (1.33–2.08)

<0.001

 Above reference range

5 (37)

1.39 (0.57–3.38)

0.472

 Not measured

37 (831)

0.43 (0.30–0.61)

<0.001

Thrombocytes

 Within reference range (150-400*109/L)

188 (1402)

ref

ref

 Below reference range

46 (242)

1.45 (1.05–2.01)

0.023

 Above reference range

26 (71)

3.18 (2.11–4.80)

<0.001

 Not measured

87 (1576)

0.39 (0.31–0.51)

<0.001

Leukocytes

 Within reference range (4.00-10.00*109/L)

128 (1523)

ref

ref

 Below reference range

11 (65)

2.10 (1.14–3.89)

0.018

 Above reference range

171 (872)

2.50 (1.99–3.14)

<0.001

 Not measured

37 (831)

0.52 (0.36–0.75)

<0.001

C-reactive protein

 Within reference range (0.0–5.0 mg/L)

88 (1102)

ref

ref

 Above reference range

214 (1244)

2.25 (1.75–2.88)

<0.001

 Not measured

45 (945)

0.58 (0.41–0.83)

0.003

Sodium

 Within reference range (136–144 mmol/L)

208 (1862)

ref

ref

 Below reference range

65 (391)

1.53 (1.16–2.02)

0.003

 Above reference range

37 (165)

2.14 (1.51–3.03)

<0.001

 Not measured

37 (873)

0.36 (0.26–0.52)

<0.001

Potassium

 Within reference range (3.6–4.8 mmol/L)

200 (1804)

ref

ref

 Below reference range

35 (162)

2.12 (1.48–3.03)

<0.001

 Above reference range

58 (304)

1.78 (1.33–2.38)

<0.001

 Not measured

54 (1021)

0.46 (0.34–0.63)

<0.001

Creatinine

 Within reference range (64–104 μmol/L)

127 (1258)

ref

ref

 Below reference range

57 (475)

1.20 (0.88–1.64)

0.247

 Above reference range

124 (685)

1.87 (1.46–2.40)

<0.001

 Not measured

39 (873)

0.43 (0.30–0.61)

<0.001

Urea

 Within reference range (2.5–7.5 mmol/L)

95 (1199)

ref

ref

 Below reference range

1 (1)

20.72 (2.88–148.92)

0.003

 Above reference range

214 (1213)

2.34 (1.83–2.97)

<0.001

 Not measured

37 (878)

0.52 (0.35–0.76)

0.001

Troponin T

 Within reference range (0.000–0.050 μg/L)

146 (1484)

ref

ref

 Above reference value

77 (268)

3.26 (2.47–4.30)

<0.001

 Not measured

124 (1539)

0.80 (0.63–1.02)

0.066

Non-fasted glucose

 Within reference range (3.1–11.0 mmol/L)

249 (2123)

ref

ref

 Below reference range

2 (7)

2.83 (0.70–11.39)

0.143

 Above reference range

55 (253)

2.04 (1.52–2.73)

<0.001

 Not measured

41 (908)

0.37 (0.27–0.52)

<0.001

  1. Abbreviations: mmol millimol, L liter, mg milligram, HR hazard ratio, CI confidence interval
  2. Bold formatting has been used to mark statistical significant P-values
  3. a‘Events’ represent the number of deaths in each category within 90 days after ED admittance
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BMC Emergency Medicine

ISSN: 1471-227X

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