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Table 1 Demographic characteristics and surgery related factors of the patients

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)
Age (years) 60.67 ± 8.18 54.41 ± 10.05 0.001
Sex, n (%)    0.484
 Male 20(55.6) 89(49.2)  
 Female 16(44.4) 92(50.8)  
BMI (kg/m2) 24.62 ± 4.04 25.44 ± 3.05 0.165
Preoperative systolic pressure 132.92 ± 15.14 130.99 ± 14.64 0.474
Preoperative diastolic pressure 78.25 ± 11.79 78.64 ± 11.33 0.850
OPLL in the surgical level, n (%) 18(50.0) 33(18.2) 0.000
Diabetes mellitus, n (%) 9(25.0) 18(9.9) 0.012
History of taking aspirin, n (%) 6(16.7) 15(8.3) 0.120
History of smoking, n (%) 15(41.7) 44(24.3) 0.033
ASA classification, n (%)    0.791
 I–II 32(88.9) 158(87.3)  
 III–IV 2(11.1) 23(12.7)  
Number of discs involved 2.42 ± 0.50 2.02 ± 0.65 0.001
  1. BMI body mass index