Minimally invasive anterior muscle-sparing versus a transgluteal approach for hemiarthroplasty in femoral neck fractures-a prospective randomised controlled trial including 190 elderly patients

Table 5 Differences in secondary outcomes between the two treatment groups

							Adjusted
	LAT	AMIS	LAT	AMIS	Effect	p	Effect	p
	n	n	Mean	Mean	Delta		Delta
Postoperative delirium	89	77	0.94	0.87	−0.07	0.667	−0.12	0.468
LOS	96	78	11.39	10.97	−0.41	0.630	−0.70	0.393
Operative time	97	82	100.1	96.3	−3.8	0.419	−5.3	0.253
Erythrocyte concentrates within 72 h	97	82	0.73	0.50	−0.23	0.174	−0.31	0.078
			%	%	RR		RR
Implant related infections	96	79	5.2	8.9	1.70	0.347	1.81	0.281
SAE during follow up	90	73	30.0	26.0	0.87	0.577	0.90	0.682
Return to no WA at 3 months	45	23	28.9	26.1	0.90	0.809	0.80	0.578
Return to no WA at 12 months	34	17	61.8	64.7	1.05	0.836	0.94	0.829
			%dead	%dead	HR		HR
1 year mortality	99	82	20.2	28.0	1.46	0.205	1.64	0.149

The results are more favorable in the LAT arm for the avoidance of implant related infections and the one-year mortality. There is also an advantage for return to no walking aids at three months. The AMIS arm, on the other hand was more favorable for all the other aspects analyzed. However, none of the differences reached statistical significance. Adjustment was performed for pfFIM and age
WA Walking aid, SAE serious adverse event or surgery related complication

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