Systematic evaluation of the degree of joint amnesia in patients after total hip arthroplasty with direct anterior approach (DAA) compared with posterior approach (PA)

Table 1 Basic characteristics of the included studies

Inclusion criteria	Country	Study design	Number of cases (T/C)	Age (mean ± SD,T/C)	Female gender (T/C, male/female)	BMI (kg/m², T/C)	Follow-up time	Outcome indicator
Zhang et al. [10]	China	RCT	(6266)	61.7 ± 7.1/63.3 ± 8.2	(35/27)/(40/26)	24.6 ± 3.0/25.0 ± 3.4	1 year	①
Shen et al. [11]	China	Cohort study	(41/335)	59.48 ± 5.14/65.43 ± 8.51	(22/19)/(157/178)	(25.18 ± 5.32)/(27.86 ± 4.17)	1 month, 3 months, and 1 year	①
Singh et al. [12]	America	Cohort study	(830/639)	65.25 ± 9.65/64.79 ± 10.96	(483/347)/(339/300)	(27.54 ± 4.94)/(29.16 ± 6.18)	3 months and 1 year	①
Domb et al. [13]	America	Cohort study	(50/50)	51.35 ± 6.60/52.01 ± 7.26	NR	(30.2 ± 3.93)/(30.81 ± 4.59)	5 years	①
Zhang et al. [14]	China	Cohort study	(127/121)	52.00 ± 12.42/51.15 ± 11.88	(94/33)/(91/30)	(25.45 ± 3.47)/(24.82 ± 3.71)	1 month, 1 year, and 5 years	①
Maldonado et al. [15]	America	Cohort study	(24/24)	58.9 ± 11.1/60.1 ± 10.3	(6/18)/(6/18)	(30.9 ± 6.2)/(31.2 ± 5.6)	3 months	①
Passano et al. [16]	America	Cohort study	(1127/207)	58/55	(566/561)/(91/116)	NR	3 months and 1 year	①

ISSN: 1749-799X