Table 1 Clinical characteristics of the study patients

Age (yr)

66(57, 75)

67(57, 76)

65.5(57, 73.8)

0.417^a)

Sex

0.163^b)

 Male

359(59.1)

237(61.2)

122(55.5)

 Female

248(40.9)

150(38.8)

98(44.5)

Emergency Severity Index

 < 0.001^b)

 Level 1

3(0.5)

2(0.5)

1(0.5)

 Lever 2

36(5.9)

17(4.4)

19(8.6)

 Lever 3

371(61.1)

199(51.4)

172(78.2)

 Lever 4

189(31.1)

161(41.6)

28(12.7)

 Lever 5

8(1.3)

8(2.1)

0(0.0)

Vital signs

 Systolic blood pressure (mmHg)

120(110, 140)

120(110, 140)

120(110, 150)

0.841^a)

 Diastolic blood pressure (mmHg)

80(70, 90)

80(70, 90)

80(70, 90)

0.387^a)

 Body temperature (°C)

36.8(36.4, 37.3)

36.7(36.3, 37.1)

37(36.5, 37.6)

 < 0.001^a)

 Heart rate (beats/min)

97(81, 110)

95(80, 110)

99(82, 113)

0.178^a)

 Respiratory rate (breaths/min)

20(19, 21)

20(19, 21)

20(19, 21)

0.180^a)

Laboratory findings

 White blood cell (× 10³/μL)

8.3(5.7, 11.4)

8.1(5.5, 10.8)

8.5(5.7, 12)

0.165^a)

 Hemoglobin (g/dL)

11.5(10.4, 12.6)

11.5(10.2, 12.6)

11.7(10.4, 12.7)

0.530^a)

 Platelet count (× 10³/μL)

224(163.3, 303.8)

230(167.5, 305.5)

217(158, 303)

0.548^a)

 C-reactive protein (mg/dL)

2.1(0.5, 7)

1.8(0.5, 6)

2.7(0.4, 9.9)

0.036^a)