. 2024 Jul 18;15(7):608–617. doi: 10.5312/wjo.v15.i7.608

Table 3.

Factors predicting return to daily activities, work, and sports within 6 mo after total knee arthroplasty

Activity	n	R ²	Predictive factors	OR (95%CI)	P value
Daily activities
Night rest	1901	0.029	Sex	0.734 (0.589-0.913)	0.006^b
			ASA	1.217 (0.989-1.498)	0.064
			Previous surgery	0.829 (0.670-1.025)	0.083
			Operative duration	0.989 (0.978-1.000)	0.047^a
			NRS pain at rest	0.912 (0.863-0.964)	0.001^b
			NRS pain during activity	1.080 (1.003-1.163)	0.042^a
			OKS	1.020 (1.002-1.038)	0.030^a
Walking without aids	1901	0.033	Sex	0.681 (0.456-1.016)	0.06
			Anesthesia technique	4.456 (1.232-16.120)	0.023^a
			OKS	1.054 (1.024-1.084)	< 0.001^b
Stair climbing	1901	0.05	BMI	0.941 (0.908-0.975)	< 0.001^b
			Sex	0.499 (0.381-0.653)	< 0.001^b
			Operative duration	0.987 (0.974-1.000)	0.053
			OKS	1.024 (1.006-1.043)	0.010^a
Grocery shopping	1901	0.051	Age	0.960 (0.933-0.989)	0.007^b
			BMI	0.939 (0.886-0.996)	0.037^a
			EQ-5D descriptive system	0.299 (0.106-0.846)	0.023^a
			OKS	1.094 (1.052-1.137)	< 0.001^b
Domestic work	1901	0.05	Age	0.958 (0.940-0.977)	< 0.001^b
			BMI	0.924 (0.889-0.961)	< 0.001^b
			NRS pain during activity	1.082 (0.995-1.178)	0.067
			OKS	1.054 (1.031-1.078)	< 0.001^b
Putting on shoes/socks	1901	0.067	Sex	2.794 (1.366-5.712)	0.005^b
Putting on shoes/socks	1901	0.067	OKS	1.106 (1.052-1.163)	< 0.001^b
Kneeling	1910	0.1	BMI	0.946 (0.917-0.976)	< 0.001^b
			Sex	0.433 (0.349-0.538)	< 0.001^b
			Alcohol consumption	1.305 (1.015-1.681)	0.039^a
			KOOS-PS	0.989 (0.978-1.001)	0.083
			OKS	1.022 (1.000-1.044)	0.048^a
Driving a car	1811	0.127	Age	0.966 (0.941-0.990)	0.007^b
			Sex	0.217 (0.140-0.337)	< 0.001^b
			ASA	0.678 (0.461-0.998)	0.049^a
			Anesthesia technique	3.815 (0.970-14.998)	0.055
			Charnley classification	1.173 (0.988-1.391)	0.068
			OKS	1.055 (1.028-1.083)	< 0.001^b
Outdoor cycling	1806	0.123	Age	0.949 (0.931-0.967)	< 0.001^b
			BMI	0.937 (0.903-0.972)	< 0.001^b
			Sex	0.347 (0.266-0.452)	< 0.001^b
			ASA	0.763 (0.580-1.004)	0.053
			Charnley classification	1.175 (1.041-1.326)	0.009^b
			OKS	1.032 (1.013-1.051)	< 0.001^b
Work
Low-impact work	765	0.026	Age	1.032 (0.999-1.065)	0.054
Low-impact work	765	0.026	EQ-5D descriptive system	2.540 (1.150-5.612)	0.021^a
Medium-impact work	448	0.069	Alcohol consumption	1.497 (0.932-2.406)	0.095
			EQ VAS	1.015 (1.004-1.027)	0.007^b
			OKS	1.030 (0.997-1.065)	0.075
Sports
Low-impact sports	1705	0.022	Age	1.038 (1.015-1.062)	0.001^b
			ASA	0.728 (0.519-1.021)	0.066
			EQ VAS	1.009 (1.001-1.017)	0.032^a
Medium-impact sports	758	0.028	Operative duration	0.985 (0.971-1.000)	0.044^a
			EQ VAS	1.007 (0.999-1.016)	0.071
			OKS	1.026 (1.004-1.048)	0.018^a
Swimming	658	0.013	EQ-5D descriptive system	0.398 (0.164-0.961)	0.041^a
Swimming	658	0.013	OKS	1.039 (1.007-1.071)	0.016^a

P < 0.05.

P < 0.01.

ASA: American Society of Anesthesiologists score; BMI: Body mass index; EQ-5D descriptive system: EuroQol five dimensions descriptive system; EQ VAS: EuroQol five dimensions Visual Analogue Scale; KOOS-PS: Knee Injury and Osteoarthritis Outcome Score - Physical Function Short Form; NRS: Numeric rating scale; OKS: Oxford knee score; OR: Odds ratio; TKA: Total knee arthroplasty.