Patient-reported dissatisfaction following second side in staged bilateral total knee arthroplasty: A systematic review

Table 3 Patients in each study reporting unequal satisfaction between knees after staged bilateral total knee arthroplasty

Ref.	Dissatisfied with TKA1, n	Dissatisfied with TKA2, n	Study RR	95%CI LL	95%CI UL	Study significance
Suzangar et al[4], 2019	61	91	1.49	1.18	1.88	0.025
Clement et al[6], 2019a	21	19	0.90	0.49	1.66	0.757
Abram et al[5], 2016a	15	32	2.0	1.11	3.61	0.0211
Scott et al[9], 2014	4	8	2.0	0.63	6.34	0.239
Tucker et al[10], 2021	0	5	12.0	0.67	215.26	0.0901
Pooled	101 (39.5%)	155 (60.5%)	1.49	1.17	1.90	0.001

¹Based on number of patients with OKS score differences between knees exceeding MCID; calculation assumes skewness of distribution < 2.

^aPairwise comparison of proportions with Chi square N-1 statistic 17.847, P < 0.0001.

Those that more satisfied with TKA2 are classified as “Dissatisfied with TKA1”; those that preferred TKA1 over TKA2 are classified as “Dissatisfied with TKA2” (n = 256, 13.6%). LL: Lower limit; TKA1: First side total knee arthroplasty; TKA2: Second side total knee arthroplasty; UL: Upper limit. Significance of the RR of dissatisfaction with TKA2 for each study with significance value set at P < 0.05.