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Table 2 Comparing variables in patients with and without increased surgical drain output

From: Risk factors for predicting increased surgical drain output in patients after anterior cervical corpectomy and fusion

Characteristics

Patients with increased surgical drain output

P

Yes (n = 36)

No (n = 181)

Operation time (min)

112.22 ± 16.49

105.21 ± 17.89

0.031

Intraoperative blood loss (mL)

109.86 ± 62.02

87.83 ± 56.40

0.036

Drainage (mL)

94.44 ± 37.70

16.17 ± 14.27

0.000

Length of drainage (h)

86.00 ± 25.25

50.87 ± 17.67

0.000

Hemoglobin (g/dL)

 Baseline

135.86 ± 11.60

138.27 ± 14.19

0.339

 Day 1 postoperation

128.06 ± 11.65

129.33 ± 13.03

0.586

 At discharge

130.92 ± 13.31

132.38 ± 15.64

0.601

Hematocrit (%)

 Baseline

39.95 ± 3.24

40.64 ± 3.83

0.314

 Day 1 postoperation

37.98 ± 4.03

37.79 ± 3.83

0.791

 At discharge

38.27 ± 3.81

38.95 ± 3.39

0.283

Length of stay (d)

5.17 ± 1.23

4.62 ± 1.45

0.036