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Table 2 Demographic data of the patients and comparison of clinical characteristics between the non-survivors and survivors

From: The Surgical Apgar Score can help predict postoperative complications in femoral neck fracture patients: a 6-year retrospective cohort study

  All the patients (N = 506) Non-survivors (N = 17) Survivors (N = 489) p value
Age (year) 87 ± 6 (70–102) 88 ± 7 (74–99) 87 ± 6 (70–102) 0.403
Male 94 (18.6) 4 (23.5) 90 (18.4) 0.593
Body mass index 20.4 ± 3.2 (13.7–32.0) 18.9 ± 4.1 (14.2–30.8) 20.5 ± 3.2 (13.7–32.0) 0.018
Comorbidities
 Hypertension 283 (55.9) 9 (52.9) 274 (56.0) 0.801
 Old cerebral infarction 63 (12.5) 4 (23.5) 59 (12.1) 0.159
 Chronic heart failure 61 (12.1) 2 (11.8) 59 (12.1) 0.970
 Diabetes mellitus 58 (9.6) 3 (17.6) 55 (11.2) 0.416
 Chronic renal failure 21 (4.2) 1 (5.9) 20 (4.1) 0.716
 Chronic obstructive pulmonary disease 20 (4.0) 2 (11.8) 18 (3.7) 0.093
 Rheumatoid arthritis 18 (3.6) 2 (11.8) 16 (3.3) 0.063
 Old myocardial infarction 15 (3.0) 1 (5.9) 14 (2.9) 0.471
 Insertion of cardiac pacemaker 9 (2.9) 0 (0) 9 (1.8) 0.573
Hemoglobin (g/dl) 11.1 ± 1.8 (6.1–16.8) 10.4 ± 2.2 (6.6–15.6) 11.2 ± 1.8 (6.1–16.8) 0.114
C-reactive protein (mg/dl) 2.6 ± 3.5 (0.0–24.3) 2.7 ± 3.3 (0.0–12.5) 2.6 ± 3.5 (0.0–24.3) 0.653
Albumin concentration (g/dl) 3.5 ± 0.5 (2.1–4.6) 3.2 ± 0.5 (2.2–4.0) 3.5 ± 0.5 (2.1–4.6) 0.006
Sodium concentration (mEq/L) 139 ± 4 (120–162) 140 ± 5 (131–147) 139 ± 4 (120–162) 0.391
Blood urea nitrogen/creatinine ratio 26.7 ± 9.1 (7.8–83.2) 29.0 ± 12.4 (10.4–56.3) 26.7 ± 8.9 (7.8–83.2) 0.601
ASA classification ≥ 3 249 (49.2%) 15 (88.2%) 234 (47.8%) 0.001
Ejection fraction (%) 64 ± 9 (39–89) 63 ± 10 (45–80) 64 ± 9 (39–89) 0.441
Moderate to severe valvular heart disease 91 (18.0) 7 (41.2) 84 (17.2) 0.011
PaO2 (mmHg) 76 ± 11 (45–104) 78 ± 10 (60–97) 76 ± 12 (45–104) 0.365
Dementia 244 (48.2) 10 (58.8) 234 (47.8) 0.374
Waiting period for surgery(day) 9.0 ± 3.3 (2–20) 9.5 ± 4.0(5–18) 9.0 ± 3.3(2–20) 0.922
Preoperative fever (≥ 38°) 151 (29.8%) 8 (47.1%) 143 (29.2%) 0.110
General anesthesia 376 (74.3) 11 (64.7) 365 (74.6) 0.357
Spinal anesthesia 130 (25.7) 6 (35.3) 124 (25.4)
Hip hemiarthroplasty 101 (20) 5 (29.4) 96 (19.6) 0.321
Osteosynthesis 405 (80) 12 (70.6) 393 (80.4)
Operation time (min) 47 ± 25 (13–190) 47 ± 24 (18–104) 47 ± 25 (13–190) 0.952
  1. The data are given as patient’s number (%) or the mean ± standard deviation (range)
  2. PaO2 partial pressure of oxygen in arterial blood gas analysis