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Table 1 Characteristics of the patients according to preoperative use of low-dose acetylsalicylic acid (LdAA)

From: Bleeding and first-year mortality following hip fracture surgery and preoperative use of low-dose acetylsalicylic acid: an observational cohort study

  LdAA No LdAA P value
  (n = 118) (n = 137)  
Age, mean (SD) 84.0 (7.6) 80.8 (9.5) < 0.01
Women, n (%) 82 (69.5) 108 (78.8) 0.11
Institutional residence, n (%) 29 (24.6) 31 (22.6) 0.77
Type of surgery (fracture), n (%)    0.07
   Hemiarthroplasty (cervical) 51 (43.2) 43 (31.4)*  
   Fixation (subtrochanteric or pertrochanteric) 67 (56.8) 94 (68.6)  
Time from admission to surgery (hrs), mean (SD) 20.1 (10.7) 19.2 (9.3) 0.51
Type of anesthesia, n (%)    
   Spinal 113 (95.8) 136 (99.3) 0.1
   General 5 (4.2) 1 (0.7) 0.1
NSAID medication at fracture, n (%) 6 (5.1) 8 (5.8) 1.00
Medical history, n (%)    
   Cardiovascular disease 72 (61) 56 (41) < 0.01
   Cerebrovascular disease 16 (13.6) 3 (2.2) < 0.01
   Hypertension 46 (39) 33 (24.1) 0.01
   Diabetes 17 (14.4) 12 (8.8) 0.17
   Renal dysfunction (serum creatinine)‡ 31 (26.3) 15 (11.0) < 0.01
   Pulmonary disease 8 (6.8) 15 (10.9) 0.28
   Rheumatoid arthritis 2 (1.7) 8 (5.8) 0.11
   Other disease 2 (1.7) 2 (1.5) 1.00
ASA score n (%)    0.02
   I 7 (5.9) 15 (10.9)  
   II 54 (45.8) 81 (59.1)  
   III 52 (44.1) 38 (27.7)  
   IV 5 (4.2) 3 (2.2)  
Compression bandage, n (%) 55 (47) 59 (43) 0.61
  1. *Including 1 total arthroplasty
  2. No data available for 15 patients receiving and 10 patients not receiving acetylsalicylic acid
  3. ‡ Defined as creatinine ≥105 μmol/L in males and ≥95 μmol/L in females
  4. ASA: American Society of Anesthesiologists; NSAID: non-steroidal anti-inflammatory drugs.