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Table 1 Characteristics of total knee and hip replacements patients who have preoperative evaluation visits (primary analysis) and the subset of patients who presented no comorbidities (subset)

From: Is there variation in utilization of preoperative tests among patients undergoing total hip and knee replacement in the US, and does it affect outcomes? A population-based analysis

 

All patients with preoperative tests

N = 55,099 (primary analysis)

Patients without comorbidities

N = 6251 (subset)

n (%)

n (%)

Sex

  

 Male

33,037 (59.96)

2907 (46.50)

 Female

22,062 (40.04)

3344 (53.50)

Age (years)

  

 8-55

10,407 (18.89)

1759 (28.14)

 56-63

10,910 (19.80)

1508 (24.12)

 64-69

12,448 (22.59)

1340 (21.44)

 70-75

10,304 (18.70)

867 (13.87)

 76+

11,030 (20.02)

777 (12.43)

Race

  

 Non-Hispanic White

42,714 (77.52)

4986 (79.76)

 Black

4407 (8.00)

388 (6.21)

 Hispanic

4312 (7.83)

466 (7.45)

 Asian/Pacific Islander

758 (1.38)

90 (1.44)

 Other/Missing race

2908 (5.28)

321 (5.14)

Insurance

  

 Medicare

28,303 (51.37)

2274 (36.38)

 Medicaid

2334 (4.24)

285 (4.56)

 Commercial

22,170 (40.24)

3369 (53.90)

 Work Comp

1615 (2.93)

230 (3.68)

 Other/Unknown

677 (1.23)

93 (1.49)

Hospital Volume

  

 25th

5546 (10.07)

587 (9.39)

 25-50th

9253 (16.79)

1015 (16.24)

 50-75th

13,395 (24.31)

1559 (24.94)

 75th+

26,905 (48.83)

3090 (49.43)

Surgery Type

  

 Total Knee Replacement

33,930 (61.58)

3299 (52.78)

 Total Hip Replacement

21,169 (38.42)

2952 (47.22)