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Table 1 Baseline demographic data, surgical factors, and length of stay in unmatched and matched patients who did and did not undergo a dipyridamole-thallium scan

From: Does preoperative dipyridamole-thallium scanning reduce 90-day cardiac complications and 1-year mortality in patients with femoral neck fractures undergoing hemiarthroplasty?

   Non-thallium scan group
  Thallium scan group (n = 113) Unmatched cohort (n = 731) p value Matched cohort (n = 339) p value
Age, mean ± SD, years 79.8 ± 8.3 74.7 ± 11.3 < 0.001 79.9 ± 8.3 0.901
Sex, n (%)    0.590   0.908
 Male 37 (32.7) 221 (30.2)   109 (32.2)  
 Female 76 (67.3) 510 (69.8)   230 (67.8)  
Body mass index, mean ± SD, kg/m2 22.6 ± 3.5 22.7 ± 4.1 0.774 22.5 ± 3.9 0.980
ASA grade, n (%)    < 0.001   0.010
 1 0 (0.0) 11 (1.5)   2 (0.6)  
 2 5 (4.4) 185 (25.3)   57 (16.8)  
 3 106 (93.8) 523 (71.5)   270 (79.6)  
 4 1 (0.9) 10 (1.4)   8 (2.4)  
Delay until surgery, mean ± SD, days 7.0 ± 12.4 2.4 ± 3.3 < 0.001 3.7 ± 4.2 < 0.001
Delay until surgery > 2 days, n (%) 110 (97.3) 352 (48.2) < 0.001 127 (37.5) < 0.001
Preoperative comorbidities, n (%)
 Ischemic heart disease 25 (22.1) 56 (7.7) < 0.001 47 (13.9) 0.038
 CHF 6 (5.3) 27 (3.7) 0.431 20 (5.9) 0.816
 Valvular heart disease 11 (9.7) 18 (2.5) 0.001 17 (5.0) 0.071
 CVA 11 (9.7) 76 (10.4) 0.829 34 (10.0) 0.928
 Diabetes 44 (38.9) 216 (29.5) 0.044 123 (36.3) 0.613
 COPD 13 (11.5) 53 (7.3) 0.117 31 (9.1) 0.464
 RA 1 (0.9) 14 (1.9) 0.440 3 (0.9) 1.000
 Liver disease 2 (1.8) 37 (5.1) 0.121 7 (2.1) 1.000
 Renal disease 14 (12.4) 59 (8.1) 0.129 37 (10.9) 0.668
 Cancer 4 (3.5) 48 (6.6) 0.213 12 (3.5) 1.000
Anesthesia type, n (%)    0.071   0.597
 General 94 (83.2) 651 (89.1)   289 (85.3)  
 Regional 19 (16.8) 80 (10.9)   50 (14.7)  
Cemented stem, n (%) 65 (57.5) 297 (40.6) < 0.001 199 (58.7) 0.826
Time in surgical theater, mean ± SD, min 125.9 ± 36.3 132.3 ± 44.5 0.142 125.5 ± 33.8 0.930
  1. ASA American Society of Anesthesiologists, CHF congestive heart failure, CVA cerebrovascular accident, COPD chronic obstructive pulmonary disease, RA rheumatoid arthritis, SD standard deviation