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Table 1 Comparison of patient demographics in 2019 versus 2020 for elective THA

From: The combined effect of policy changes and the covid-19 pandemic on the same day discharge and complications following total hip arthroplasty: a nationwide analysis

  2019 2020 P Value
# Number of Patients % # Number of Patients %
Number of Patients   43,667   34,130   
Age Cohorts  < 40 869 2.00% 695 2.00% 0.122
40–44 774 1.80% 611 1.80%  
45–49 1558 3.60% 1141 3.30%  
50–54 2969 6.80% 2376 7.00%  
55–59 5374 12.30% 4212 12.30%  
60–64 7391 16.90% 5756 16.90%  
65–69 7969 18.20% 6489 19.00%  
70–74 7440 17.00% 5797 17.00%  
75–79 4987 11.40% 3794 11.10%  
80–84 2817 6.50% 2081 6.10%  
85 +  1519 3.50% 1178 3.50%  
Gender female 23,742 54.40% 18,368 53.80% 0.299
male 19,925 45.60% 15,762 46.20%  
Race American Indian or Alaska Native 163 0.40% 152 0.40%  < 0.001
Asian 594 1.40% 709 2.10%  
Black or African American 3636 8.30% 3013 8.80%  
Native Hawaiian or Pacific Islander 74 0.20% 75 0.20%  
Some Other Race 0 0.00% 32 0.10%  
Unknown/Not Reported 10,442 23.90% 7339 21.50%  
White 28,758 65.90% 22,810 66.80%  
BMI Category  < 18.5 331 0.80% 290 0.90% 0.241
18.5–24.9 7648 17.60% 6129 18.10%  
25.0–29.9 14,465 33.30% 11,092 32.80%  
30.0–34.9 11,635 26.80% 9078 26.80%  
35.0–39.9 6233 14.30% 4871 14.40%  
40.0 +  3124 7.20% 2399 7.10%  
Diabetes mellitus Insulin Dependent 1282 2.90% 966 2.80% 0.632
No 38,263 87.60% 29,910 87.60%  
Non-Insulin Dependent 4122 9.40% 3254 9.50%  
Current smoker No 38,621 88.40% 30,291 88.80% 0.181
Yes 5046 11.60% 3839 11.20%  
Dyspnea At Rest 52 0.10% 37 0.10% 0.007
Moderate Exertion 2001 4.60% 1405 4.10%  
No 41,614 95.30% 32,688 95.80%  
Functional health status Independent 42,755 97.90% 33,431 98.00%  < 0.001
Partially Dependent 570 1.30% 557 1.60%  
Totally Dependent 25 0.10% 37 0.10%  
Unknown 317 0.70% 105 0.30%  
History of Severe COPD No 42,026 96.20% 32,923 96.50% 0.103
Yes 1641 3.80% 1207 3.50%  
Congestive heart failure (CHF) No 43,483 99.60% 33,986 99.60% 0.991
Yes 184 0.40% 144 0.40%  
Hypertension No 19,743 45.20% 15,543 45.50% 0.362
Yes 23,924 54.80% 18,587 54.50%  
Currently on dialysis (pre-op) No 43,588 99.80% 34,057 99.80% 0.301
Yes 79 0.20% 73 0.20%  
Steroid use for chronic condition No 42,170 96.60% 32,955 96.60% 0.912
Yes 1497 3.40% 1175 3.40%  
> 10% loss body weight in last 6 months No 43,583 99.80% 34,053 99.80% 0.311
Yes 84 0.20% 77 0.20%  
Bleeding disorders No 42,917 98.30% 33,491 98.10% 0.106
Yes 750 1.70% 639 1.90%  
mFI 0 18,162 41.60% 14,278 41.80% 0.625
1 19,707 45.10% 15,309 44.90%  
2 5384 12.30% 4205 12.30%  
3 386 0.90% 319 0.90%  
4 25 0.10% 19 0.10%  
5 3 0.00% 0 0.00%  
Inpatient/Outpatient Inpatient 41,162 94.30% 21,977 64.40%  < 0.001
Outpatient 2505 5.70% 12,153 35.60%  
ASA classification 1-No Disturbance 1419 3.20% 1004 2.90% 0.012
2-Mild Disturbance 22,179 50.80% 17,310 50.70%  
3-Severe Disturbance 19,273 44.10% 15,101 44.20%  
4-Life Threat 759 1.70% 690 2.00%  f
Principal anesthesia technique Epidural 266 0.60% 222 0.70%  < 0.001
General 17,782 40.70% 13,149 38.50%  
MAC/IV Sedation 8963 20.50% 7962 23.30%  
Regional 509 1.20% 663 1.90%  
Spinal 16,111 36.90% 12,109 35.50%  
Other 36 0.08% 25 0.07%  
Total operation time (minutes)   89.81   91.65    < 0.001
Length of hospital stay (days)   1.78   1.55    < 0.001