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Table 1 Demographics among patients with hemoglobin ≤ 6.5 mmol/L on the 3rd postoperative day

From: Association between intravenous iron therapy and short-term mortality risk in older patients undergoing hip fracture surgery: an observational study

  No treatment (n=52) ABT (n=38) IV Monofer (n=80) IV Monofer and ABT (n=40) Total (n=210) p value
Gender
 Female 28 (53.8) 20 (52.6) 41 (51.2) 18 (45.0) 107 (51.0)  
 Male 24 (46.2) 18 (47.4) 39 (48.8) 22 (55.0) 103 (49.0) 0.853
Age 82.6 (9.1) 83.2 (7.1) 83.6 (8.9) 84.7 (9.2) 83.5 (8.7) 0.709
BMI (kg/m2) 24.1 (4.2) 24 (5.1) 24.2 (3.9) 23.2 (3.8) 23.9 (4.2) 0.655
Charlson Comorbidity Index 1.9 (2) 2.7 (2.1) 1.9 (2.2) 2.1 (1.7) 2.1 (2.1) 0.219
Polypharmacy (≥5 medications) 34 (65.4) 33 (86.8) 55 (68.8) 34 (85.0) 156 (74.3) 0.023*
Admission source
 Home-independent 38 (73.1) 27 (71.1) 55 (68.8) 29 (72.5) 149 (71.0)  
 Nursing home 14 (26.9) 11 (28.9) 25 (31.2) 11 (27.5) 61 (29.0) 0.951
Study period
 1 51 (98.1) 37 (97.4) 12 (15.0) 7 (17.5) 107 (51.0)  
 2 1 (1.9) 1 (2.6) 68 (85.0) 33 (82.5) 103 (49.0) < 0.001*
Fracture
 Intracapsular 29 (55.8) 14 (36.8) 31 (38.8) 13 (32.5) 87 (41.4)  
 Extracapsular 23 (44.2) 24 (63.2) 49 (61.2) 27 (67.5) 123 (58.6) 0.098
Operation
 Arthroplasty 19 (36.5) 16 (42.1) 23 (28.8) 7 (17.5) 65 (31.0)  
 Intramedullary nails 19 (36.5) 21 (55.3) 48 (60.0) 30 (75.0) 118 (56.2)  
 AO screws 2 (3.8) 0 (0.0) 3 (3.8) 1 (2.5) 6 (2.9)  
 Dynamic hip screws 7 (13.5) 1 (2.6) 4 (5.0) 1 (2.5) 13 (6.2)  
 Other 5 (9.6) 0 (0.0) 2 (2.5) 1 (2.5) 8 (3.8) 0.014*
Time to theatre (days) 0.6 (0.5) 0.8 (0.8) 0.8 (0.5) 0.7 (0.6) 0.7 (0.6) 0.425
Preoperative Hgb (mmol/L) 7.7 (0.8) 7.4 (1) 7.9 (0.7) 6.8 (1) 7.5 (0.9) < 0.001*
 Missing 9 5 19 10 43  
Perioperative blood loss (mL) 185.7 (108.9) 387.1 (414.1) 205.1 (159.9) 254.7 (196.1) 246.8 (241.1) 0.001*
 Missing 17 7 21 8 53  
Hgb postoperative day 1 (mmol/L) 6.3 (0.6) 5.4 (0.8) 6.1 (0.6) 5.1 (0.6) 5.8 (0.8) < 0.001*
 Missing 2 0 0 0 2  
Hgb postoperative day 3 (mmol/L) 5.8 (0.5) 5.4 (0.7) 5.6 (0.5) 5.2 (0.7) 5.6 (0.6) < 0.001*
Hgb postoperative between day
14–30 (mmol/L)
6.3 (0.7) 6.4 (0.5) 6.8 (0.6) 6.6 (0.8) 6.6 (0.7) 0.116
 Missing because deceased 5 4 2 4 15  
 Missing because no hgb control 28 21 48 12 109  
Length of stay (days) 6.5 (3.9) 7.1 (4) 5.9 (2.1) 6.9 (2.6) 6.5 (3.1) 0.177
Discharged to
 Home-independent 18 (34.6) 14 (36.8) 37 (46.2) 14 (35.0) 83 (39.5)  
 Nursing home 34 (65.4) 20 (52.6) 43 (53.8) 24 (60.0) 121 (57.6)  
 Dead in hospital 0 (0.0) 4 (10.5) 0 (0.0) 2 (5.0) 6 (2.9) 0.023*
Readmission/transmission to ICUa
 Readmitted 13 (25.0) 5 (13.2) 14 (17.5) 10 (25.0) 42 (20.0)  
 Transmitted to ICUa 0 (0.0) 0 (0.0) 1 (1.2) 1 (2.5) 2 (1.0) 0.558
  1. Data are presented as mean ± SD (age, BMI, Charlson Comorbidity Index, perioperative blood loss, time to theatre, hemoglobin levels, length of stay) or number of patients and percentage (all others)
  2. aIntensive Care unit
  3. *p < 0.05