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Table 1 Descriptive statistics of patient population across study time periods

From: Effectiveness of a novel and scalable clinical decision support intervention to improve venous thromboembolism prophylaxis: a quasi-experimental study

Variable   Period 1 Period 2 Period 3 P value
Age (years) Mean (SD) 53.6 (19.1) 53.6 (19.1) 54.0 (18.9) <0.01
Sex Female 40,333 (57.4%) 58,506 (57.1%) 28,799 (57.2%) 0.56
Race White 38,317 (54.5%) 56,095 (54.8%) 27,039 (53.7%) <0.01
  Other 31,547 (44.9%) 45,984 (44.9%) 23,109 (45.9%)  
  Unknown 419 (0.6%) 329 (0.3%) 223 (0.4%)  
Health Insurance Self Pay 841 (1.2%) 1,258 (1.2%) 501 (1.0%) <0.01
  Insured 65,246 (92.8%) 99,895 (97.5%) 49,307 (97.9%)  
  Unknown 4,196 (6.0%) 1,255 (1.2%) 563 (1.1%)  
Weight (kg) Mean (SD) 82.3 (24.0) 82.8 (24.1) 82.8 (24.1) <0.01
CrCl <30 Yes 5,159 (9.7%) 7,547 (9.9%) 3,828 (8.8%) <0.01
  No 47,855 (90.3%) 68,743 (90.1%) 39,513 (91.2%)  
Length of Stay (days) Mean (SD) 5.2 (7.7) 5.1 (7.6) 5.2 (7.0) <0.01
DRG Weight Mean (SD) 1.7 (1.9) 1.7 (1.9) 1.7 (2.0) <0.01
Discharging Unit Medicine 2,488 (46.2%) 47,973 (46.8%) 24,373 (48.4%) <0.01
  Ortho/Trauma 7,657 (10.9%) 11,506 (11.2%) 5,825 (11.6%)  
  Other Surgery 30,138 (42.9%) 42,929 (41.9%) 20,173 (40.0%)  
Top 5 Primary Discharge Diagnoses First Device complications 2,856 (4.4%) Device complications 4,423 (4.5%) Device complications 2,355 (4.8%) NA
  Second Osteoarthritis 2,327 (3.6%) Osteoarthritis 3,505 (3.5%) Osteoarthritis 1,805 (3.7%)  
  Third CAD 2,104 (3.3%) CAD 3,342 (3.4%) Dysrhythmia 1,676 (3.5%)  
  Fourth CHF 1,971 (3.0%) Dysrhythmia 3,321 (3.4%) CHF 1,460 (3.0%)  
  Fifth Dysrhythmia 1,940 (3.0%) Birth complications 2,935 (3.0%) CAD 1,419 (2.9%)  
  1. Abbreviations: CAD, coronary artery disease; CHF, congestive heart failure; CrCl, creatinine clearance; DRG, diagnosis-related group; SD, standard deviation.