3-h drain clamping is not effective to reduce total blood loss after primary total knowledge

Table 1 Baseline characteristics of enrolled patients

	3-h drain clamping group (n = 43)	Control group (n = 43)	P value
Age, year	71.9 ± 6.5	72.0 ± 6.4	0.756
Sex, male: female	7: 36	7: 36	1.000
Body mass index, kg/m²	25.1 ± 3.3	25.2 ± 3.2	0.611
Diagnosis			1.000
Osteoarthritis	41 (95.3%)	41 (95.3%)
Rheumatoid arthritis	2 (4.7%)	2 (4.7%)
Preoperative anemia	12 (27.9%)	13 (30.2%)	0.640
Aspirin	7 (16.3%)	5 (11.6%)	0.218
Prosthesis, NexGen LPS: Genesis II	33: 10	33: 10	1.000

Preoperative anemia was diagnosed through a preoperative assessment, and threshold was defined by the World Health Organization (<12.0 g/dL in women and <13.0 g/dL in men)
Values were presented as mean ± standard deviation or as number (percentage)
Abbreviations: Genesis II posterior stabilized Genesis II TKA (Smith & Nephew, Memphis, TN, USA), NexGen LPS NexGen Legacy Posterior Stabilized TKA (Zimmer, Warsaw, Indiana, USA)

ISSN: 2234-2451