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Table 1 Baseline characteristics

From: Residents learning ultrasound-guided catheterization are not sufficiently skilled to use landmarks

Parameters

Ultrasound-guided n = 84

Landmark-guided n = 88

P-value

SAPS2

55 ± 18

55 ± 20

0.8

Body mass index, kg/m2

30 ± 10

28 ± 6

0.2

Heart rate, bpm

92 ± 20

98 ± 23

0.07

SBP, mmHg

113 ± 30

116 ± 30

0.3

DBP, mmHg

60 ± 17

59 ± 17

0.6

Prothrombin time, %

63 ± 21

64 ± 19

0.1

Activated partial thromboplastin time, sec

33 ± 8

36 ± 17

0.2

Platelet count, 103/mm3

186 ± 120

188 ± 122

0.9

Type of catheter (central venous catheter / dialysis catheter), n

49 (58)/35 (42)

41 (47)/47 (53)

0.3

Site (jugular/femoral), n

49 (58)/35 (42)

36 (41)/52 (59)

0.05

  1. Results are presented as mean ± SD, or number (n). SAPS2, Simplified Acute Physiologic Score 2; SBP, systolic blood pressure; DBP, diastolic blood pressure.