Statistics HR (95% CI) P valueAge (years) 79.59 ± 6.80 1.08 (1.06, 1.09) <0.0001 Sex Male 849 (32.79%) 1 Female 1740 (67.21%) 0.74 (0.65, 0.85) <0.0001 Occupation Retirement 1489 (57.51%) 1 Farmer 629 (24.30%) 0.91 (0.78, 1.07) 0.2607 Other 471 (18.19%) 0.84 (0.70, 1.01) 0.0669 History of allergy 101 (3.90%) 0.88 (0.61, 1.27) 0.4854 Injury mechanism Falling 2501 (96.60%) 1 Accident 68 (2.63%) 0.25 (0.12, 0.54) 0.0003 Other 20 (0.77%) 1.61 (0.86, 2.99) 0.1369 Fracture classification Intertrochanteric fracture 1887 (72.89%) 1 Femoral neck fracture 635 (24.53%) 0.85 (0.71, 1.01) 0.0676 Subtrochanteric fracture 67 (2.59%) 0.78 (0.50, 1.20) 0.2584 aCCI 4.22 ± 1.08 1.51 (1.43, 1.61) <0.0001 Hypertension 1258 (48.59%) 1.13 (0.99, 1.29) 0.0643 Diabetes 516 (19.93%) 1.01 (0.86, 1.20) 0.882 CHD 1377 (53.19%) 1.32 (1.15, 1.51) <0.0001 Arrhythmia 872 (33.68%) 1.32 (1.15, 1.51) <0.0001 Hemorrhagic stroke 57 (2.20%) 1.14 (0.74, 1.76) 0.5501 Ischemic stroke 755 (29.16%) 1.42 (1.24, 1.64) <0.0001 Cancer 75 (2.90%) 1.77 (1.28, 2.44) 0.0005 Multiple injuries 181 (6.99%) 0.99 (0.76, 1.28) 0.9177 Dementia 103 (3.98%) 2.62 (2.03, 3.38) <0.0001 COPD 168 (6.49%) 1.55 (1.23, 1.95) 0.0002 Hepatitis 81 (3.13%) 1.62 (1.17, 2.23) 0.0033 Gastritis 46 (1.78%) 0.95 (0.58, 1.57) 0.8533 Time to admission (h) 80.89 ± 248.16 1.00 (1.00, 1.00) 0.0531 Time to operation (d) 4.30 ± 2.58 1.03 (1.00, 1.05) 0.0481 Treatment strategy Conservation 225 (8.69%) 1 ORIF 1743 (67.32%) 0.31 (0.26, 0.38) <0.0001 HA 586 (22.63%) 0.33 (0.26, 0.41) <0.0001 THA 35 (1.35%) 0.06 (0.02, 0.26) 0.0001 Operation time (mins) 94.08 ± 37.16 1.00 (1.00, 1.00) 0.0433 Blood loss (mL) 245.52 ± 162.69 1.00 (1.00, 1.00) 0.4246 Transfusion (U) 1.16 ± 1.27 1.05 (0.99, 1.11) 0.1136 Infusion (mL) 1559.80 ± 388.06 1.00 (1.00, 1.00) 0.0001 Neutrophil ( 6.92 ± 2.79 1.03 (1.00, 1.05) 0.0351
