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Table 1 Details of the studies

From: Outpatient total knee arthroplasty leads to a higher number of complications: a meta-analysis

Study Inclusion criteria Number of patients Demographics m/f (mean age) (BMI) Number of complications-readmissions-deaths Follow-up (months)
Arshi et al. [23]
J Bone Joint Surg Am
Patients underwent TKA in PDPR database. Code CPT 27447 O: 4,391
I: 128,951
Total: 133,342
O: 1,560/2831 (na) (na)
I: 46,805/82,146 (na) (na)
O: 833-na-na
I: 18,049-na-na
12
Cassard et al. [24]
Orthop Traumatol Surg Res
Consecutive patients undergone TKA in the institute O: 61
I: 513
Total: 574
O: 38/23 (65.4) (na)
I: 251/262 (70.5) (na)
O: 5-2-0
I: 37-25-0
1
Darrith et al. [25]
J.Arthroplasty
No specific BMI or age cutoff, in general patients were physiologically young, without medical comorbidities that required an inpatient admission O: 46
I: 46
Total: 92
O: na (na) (na)
I: na (na) (na)
O: 5-0-0
I: 5-0-0
3
Gauthier-Kwan et al. [26]
J.Arthroplasty
patients undergone primary TKA for end-stage osteoarthritis an ASA of 3 or less with a stable medical profile, and a BMI under 45 kg/m2 O:43
I:43
tot:86
O:29/14 (62.5)(28.6)
I:22/21 (62.5)(30.4)
O:8-1-na
I:6-1-na
3
Gillis et al. [27]
Int Orthop
Consecutive patients undergone TKA in the institute O: 125
I: 275
Total: 400
O: 58/64 (62.9) (33.5)
I: 107/168 (66) (28.8)
O: 17-3-0
I: 36-12-0
3
Kimball et al.
[30]
Orthopedics
18 years or older listed as outpatient or inpatient in their database O: 863
I: 863
Total: 1726
O: 373/490 (na) (na)
I: 373/490 (na) (na)
O: na-44-na
I: na-63-na
3
Nowak et al. [28]
Bone Joint J
18 years or older who underwent TKA between 2005 and 2016 using the ACS NSQIP database O: 986
I: 75,260
Total: 76,246
O: 328/658 (67.5) (32)
I: 27,105/48,155 (67.1) (31.8)
O: 44-na-na
I: 2331-na-na
1
Springer et al. [29]
Orthop Clin North Am
Healthy patients with no active cardiopulmonary conditions, no history of sleep apnea, deep venous thrombosis, or pulmonary embolus, BMI) less than 40, good family support at home O: 92
I: 74
Total: 166
O: na (na) (na)
I: na (na) (na)
O: 15-12-na
I: 7-6-na
1