Number

Estimated true blood loss in ml

Pre op Hb in gm/dl

Hemoglobin drop in gm/dl

Transfusions

Surgery time in min

Osteoarthritis

65

970 ± 521.15

11.46 ± 1.43

2.5 ± 1.12

0.69 ± 0.77

86.03 ± 8.34

Rheumatoid Arthritis

10

889.7 ± 451.55

10.65 ± 0.58

2.8 ± 1.17

1.3 ± 1.16

90.8 ± 15.63

P value

0.62

0.004

0.5

0.14

0.37