Short-term outcomes of total knee arthroplasty performed with and without a tourniquet

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Table 3

Secondary aim (gender subgroup outcomes).

	Males	Females	P value	U value	Z value
Total blood volume loss (mL)
Tourniquet	1052.81 (979.16; 786.91–1268.29)	758.13 (684.46; 520.69–959.21)	0.00^*	191.00	−2.834
No tourniquet	1361.57 (1209.22; 1080.27–1572.18)	1195.17 (1199.69; 971.41–1443.43)	0.43	193.00	−0.788
Knee ROM (degrees)
Day 2 flexion
Tourniquet	84.67 (90; 80–90)	71.56 (72.50; 60–85)	0.00^*	169.00	−3.093
No tourniquet	79.33 (80; 70–90)	76.47 (80; 67.50–87.50)	0.46	177.00	−0.724
Day 2 lag
Tourniquet	20.28 (20; 17.50–26.25)	18.46 (17.50; 11.25–25.00)	0.42	217.00	−0.806
No tourniquet	17 (15; 10–30)	25.29 (30; 20–30)	0.02^*	96.50	−2.307
Length of stay (days)
Tourniquet	3.64 (3; 3–4)	5.22 (4; 4–5)	0.00^*	179.00	−3.180
No tourniquet	3.88 (3; 3–4)	4.50 (4.50; 3–6)	0.03^*	141.50	−2.105

For clarity, only the outcomes that are significantly different between subgroups are presented in the table.

The data are presented as the mean (median; IQR), where IQR is the interquartile range.

Marks a significant difference between groups.

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