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Table 1 Chi-square test compares the baseline variable of the two groups with a normal distribution

From: Long-term survival of femoral neck fracture patients aged over ninety years: Arthroplasty compared with nonoperative treatment

VariableTreatment regime groupsχ2P
Nonoperative group n(%)Arthroplasty group n(%)
Gender
 Female27 (62.8)16 (37.2)0.0490.825
 Male26 (60.5)17 (39.5)
Fracture side
 Left28 (65.1)15 (34.9)0.4430.506
 Right25 (58.1)18 (41.9)
Complications
 Pulmonary complications32 (72.7)12 (27.3)3.1010.078
 Peptic ulcer disease5 (62.5)3 (37.5)0.003a0.958b
 UTI4 (57.1)3 (42.9)0.065a0.799b
 Cardiac Complications6 (60.0)4 (40.0)0.013a0.910b
 Cerebrovascular complications8 (100.0)0 (0.0)3.849a0.050b
 DVT9 (90.0)1 (10.0)2.614a0.106b
 Delirium26 (74.3)9 (25.7)3.9990.046*
 Pressure ulcers20 (83.3)4 (16.7)6.6320.010*
 Hyperthermia13 (48.1)14 (51.9)3.0240.082
Commodity
 Diabetes mellitus5 (41.7)7 (58.3)1.471a0.225b
 COPD34 (69.4)15 (30.6)2.9000.089
 Renal disease9 (81.8)2 (18.2)1.306a0.257b
 Coronary artery disease5 (50.0)5 (50.0)0.210a0.647b
 Commobidity Hypertension21 (56.8)16 (43.2)0.6520.420
 Commobidity UTI2 (50.0)2 (50.0)0.240a0.624b
 Commobidity Stoke9 (81.8)2 (18.2)1.306a0.253b
Admission laboratory parameters
 Low HGB(< 12 g/dL)30 (61.2)19 (38.8)0.0080.929
 Low HCT (< 30%)14 (87.5)2 (12.5)5.5640.018*
 Low WBC count (< 4500/mcL)2 (50.0)2 (50.0)0.240a0.624b
 High WBC count(> 10,000/mcL)14 (66.7)7 (33.3)0.2980.585
 Low platelets (< 150,000/mcL)23 (62.2)14 (37.8)0.0080.929
 High INR (> 1.1)23 (71.9)9 (28.1)2.2630.133
 High BUN (> 30 mg/dL)15 (71.4)6 (28.6)1.1290.288
 Creatinine (> 1.3 mg/dL)9 (60.0)6 (40.0)0.0200.887
 Low ALB<34G/L29 (80.6)7 (19.4)9.3810.002 *
 High Bilirubin (> 1.9 mg/dL)3 (60.0)2 (40.0)0.006a0.939b
 High sodium (> 145 mEq/L)1 (25.0)3 (8.1)1.033a0.310b
 Low sodium (< 135 mEq/L)15 (65.2)8 (34.8)0.1710.679
Transfusion
 Number of Transfusion Red cell8 (30.8)18 (69.2)15.001< 0.001*
 Number of Transfusion Plasma4 (30.8)9 (69.2)4.726a0.030b*
ICU stay5 (55.6)4 (44.4)0.001a0.973b
30-day re-admission8 (80.0)2 (20.0)0.856a0.355b
  1. * P < 0.05 was considered statistically significant. a. The chi-square test of continuous correction was used, and the expected count of the cell was less than 5 and greater than 1. b. Continuous correction chi of square test significance (2-sided)