Table 2 Clinical and demographic data between the study groups. Continuous variables were presented as means (± SD).

From: A prospective randomized study, use of closed suction drainage after revision hip arthroplasty may lead to excessive blood loss

 

Drainage (n = 20)

Non-drainage (n = 20)

p-value

Males/females

9/11

8/12

0.75*

Age (years)

59.6 (± 10.8)

62.1 (± 14)

0.52**

BMI (kg/m2)

27.7 (± 5.6)

26.9 (± 4.4)

0.63**

Operating time (minutes)

148 (± 43.3)

138.8 (± 43.9)

0.51**

Hospital stay (days)

11.3 (± 3.6)

12 (± 4.5)

0.64**

Total blood volume (Nadler’s formula17) (mL)

4763.6 (± 946)

4631.5 (± 899)

0.65**

APTT

25.9 (± 4.9)

25.3 (± 4.2)

0.66**

PT

13.5 (± 1.2)

13.4 (± 1.4)

0.76**

INR

1.09 (± 0.08)

1.09 (± 0.1)

0.97**

Fixation type

0.26*

Cemented

3

6

Uncemented

17

14

  1. *Chi2 Test (2 × 2).
  2. **Student T test.
  3. BMI Body Mass Index, APTT activated partial thromboplastin time, PT prothrombine time, INR international normalized ratio.