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Table 1 Patient and ultrasound characteristics

From: Color Doppler ultrasonography of an agitated solution is predictive of accurate catheter placement for a continuous popliteal sciatic nerve block

Combined

None (n = 10)

Partial (n = 30)

Complete (n = 41)

P value

Patient

    

 Male

20.0

40.0

51.2

0.21

 Age (years)

58 (51, 74)

52 (35, 61)

53 (29, 68)

0.20

 Height (cm)

161 (156, 184)

170 (157, 180)

168 (155, 185)

0.32

 Weight (kg)

83 (69, 88)

80 (63, 96)

80 (64, 104)

0.93

 BMI

31 (26, 34)

28 (22, 34)

28 (23, 32)

0.31

 ASA classification (I, II, III)

10.0, 60.0, 30.0

20.0, 56.7, 23.3

12.2, 65.9, 22.0

0.85

 Diabetes mellitus (%)

0.00

3.3

9.8

0.43

 Surgical region (hindfoot) (%)

60.0

66.7

78.0

0.47

 Catheter depth (1 cm) (%)

60.0

63.3

75.6

0.47

Ultrasound

    

 Sciatic nerve visualization (good, fair, poor)

40.0, 30.0, 30.0

56.7, 36.7, 6.7

63.4, 26.8, 9.8

0.19

  1. Median (10th, 90th) is used to summarize continuous variables and percentages are used for categorical variables, single value: a; multiple values: a, b, c. P values were calculated using the Kruskal-Wallis test for continuous variables and Pearson’s Chi-squared test for categorical variables. BMI, body mass index; ASA, American Society of Anesthesiologists