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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