Suction drainage in total knee replacement does not influence early functional outcomes or blood loss: a randomized control trial

Table 2 Mean knee range of motion (degrees) divided between two groups

	Groups	Number of patients	Mean ± Standard deviation	P-value
Preoperative flexion (°)	Study	57	124.7 ± 15.0	0.911
Preoperative flexion (°)	Control	72	124.4 ± 14.5	0.911
Preoperative loss of extension (°)	Study	49	3.3 ± 5.4	0.107
Preoperative loss of extension (°)	Control	60	1.8 ± 4.1	0.107
End of the surgery flexion (°)	Study	39	137.1 ± 9.8	0.572
End of the surgery flexion (°)	Control	51	136.0 ± 7.2	0.572
End of the surgery loss of extension (°)^a	Study	39	0.5 ± 2.2	0.030
End of the surgery loss of extension (°)^a	Control	51	-0.4 ± 2.0	0.030
Flexion on the 3^rd day (°)	Study	63	87.4 ± 20.4	0.996
Flexion on the 3^rd day (°)	Control	73	87.5 ± 17.1	0.996
Loss of extension on the 3^rd day (°)	Study	63	1.0 ± 12.1	0.613
Loss of extension on the 3^rd day (°)	Control	73	0.05 ± 11.0	0.613
Flexion on 6 week follow-up (°)	Study	67	110.1 ± 13.5	0.073
Flexion on 6 week follow-up (°)	Control	79	105.4 ± 17.3	0.073
Loss of extension on 6 week follow-up (°)	Study	47	3.0 ± 3.8	0.220
Loss of extension on 6 week follow-up (°)	Control	60	2.0 ± 4.9	0.220

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