Table 1 Demographics and clinical risk factors of the elderly and younger patients with candidemia Characteristics Elderly Patients (n = 63) Younger Patients (n = 91) Age (years) a 75.4 ± 12.7 41.2 ± 11.9 Male sex 51 (81.0) 63 (69.2) a LOS 45.3 ± 32.8 39.4 ± 31.5 Hospital settings ICUs 31 (49.2) 22 (24.2) Medical wards 14 (22.2) 34 (37.4) Surgical wards 12 (19.0) 27 (29.7) b Others 6 (9.5) 8 (8.8) Host-related risk factors Solid tumour 15 (23.8) 6 (6.6) b Haematological malignancy 3 (4.8) 14 (15.4) Neutropenia 5 (7.9) 21 (23.1) Diabetes mellitus 24 (38.1) 10 (11.0) Chronic renal failure 18 (28.6) 9 (9.9) Prior immunosuppressive drugs 16 (25.4) 27 (29.7) Severe hypoalbuminemia 13 (20.6) 11 (12.1) Hospital-related risk factors Surgeries 14 (22.2) 30 (33.0) Abdominal surgical operations 9 (14.3) 14 (15.4) ICU stay ≥ 5 days 19 (30.2) 8 (8.8) Multiple blood product transfusion 8 (12.7) 16 (17.6) Parental nutrition 20 (31.7) 17 (18.7) Receipt of mechanical ventilation 27 (42.9) 22 (24.2) CVC placement 32 (50.8) 29 (31.9) Urethral catheter placement 34 (54.0) 32 (35.2) b Prior antibacterial exposure 63 (100.0) 89 (97.8) ≥ 3 kinds of prior antibacterial drugs 29 (46.0) 37 (40.7) Data are presented as n (%) or means ± SD. ICU, intensive care unit; LOS, length of stay; CVC, central venous catheter. a Two-independent samples t-test; bFisher’s exact test; Unspecified: Chi-square test. 1 p value <0.001 0.103 0.265 0.001 0.046 0.136 0.876 0.002 0.039 0.014 0.001 0.003 0.561 0.151 0.147 0.851 0.001 0.411 0.062 0.014 0.018 0.020 0.645 0.508 Table 2 Antifungal therapy started before and after the microbiological documentation of Candida in the bloodstream. Elderly Patients (n = 63) Characteristics Younger Patients (n = 91) Antifungal therapy administered before 22 (34.9%) 50 (54.9%) microbiological documentation Treatment method Prophylactic treatment 7 (11.1%) 18 (19.8%) Empiric treatment 12 (19.0%) 25 (27.5%) a Undetermined 3 (4.8%) 7 (7.7%) Agents selection Fluconazole 16 (25.4%) 34 (37.4%) a Itraconazole 3 (4.8%) 12 (13.2%) Voriconazole a 3 (4.8%) 4 (4.4%) Antifungal therapy administered/changed after 28 (44.4%) 39 (42.9%) microbiological documentation Agents selection Fluconazole 4 (6.3%) 14 (15.4%) a Itraconazole 6 (9.5%) 4 (4.4%) a Voriconazole 4 (6.3%) 6 (6.6%) a Micafungin 3 (4.8%) 5 (5.5%) Caspofungin 11 (17.5%) 10 (11.0%) Overall Triazoles usage 36 (57.1%) 72 (79.1%) Echinocandins usage 14 (22.2%) 15 (16.5%) Absence of antifungal therapies 16 (25.4%) 11 (12.1%) Data are presented as n (%). Antifungal agents were changed in 3 elderly patients and 7 younger patients. a Fisher’s exact test; Unspecified: Chi-square test. 2 p value 0.014 0.151 0.299 0.694 0.119 0.083 0.775 0.845 0.086 0.349 0.786 0.867 0.250 0.003 0.370 0.033 Table 3 Laboratory data and outcomes of the elderly and younger patients with candidemia Characteristics Laboratory data Hemoglobin (g/L) Platelet count (×109/L) Serum creatine (μmol/L) Blood sugar (mmol/L) Serum sodium (mmol/L) Serum potassium (mmol/L) Total bilirubin (μmol/L) b High Fever (T>39℃) a Concurrent bacteraemia APACHE II score Age-adjusted APACHE II score Septic shock a 30-day mortality rate a Elderly Patients (n = 63) Younger Patients (n = 91) 86.9 ± 29.1 163.4 ± 93.7 112.0 ± 95.3 9.3 ± 5.1 138.6 ± 5.8 93.8 ± 31.2 153.9 ± 117.5 83.6 ± 67.4 6.8 ± 2.9 137.5 ± 5.5 0.168 0.594 3.9 ± 1.0 16.3 (6.2-31.8) 19 (30.2) 8 (12.7) 20.3 ± 8.1 16.2 ± 7.7 27 (42.9) 20 (31.7) 3.8 ± 0.9 14.1 (8.4-30.9) 35 (38.5) 15 (16.5) 14.8 ± 7.5 14.0 ± 7.2 26 (28.6) 16 (17.6) 0.518 0.390 0.288 0.517 Data are presented as n (%), means ± SD or median (IQR). APACHE, Acute Physiology and Chronic Health Evaluation. a Chi-square test; bMann-Whitney U test; Unspecified: Two-independent samples t-test. 3 p value 0.032 0.001 0.234 0.001 0.072 0.067 0.041 Table 4 Univariate analysis of outcome in elderly patients with candidemia Non-survived Survived (n = 20) (n = 43) Chronic renal failure 9 (45.0) 9 (20.9) 0.049 Severe hypoalbuminemia 8 (40.0) 5 (11.6) 0.040 Receipt of mechanical ventilation 14 (70.0) 12 (30.2) 0.003 3 (15.0) 19 (44.2) Absence of antifungal therapies 10 (50.0) 6 (14.0) 0.002 Platelet count ≤ 100 g/L×109/L 7 (35.0) 5 (11.6) 0.028 Serum creatine ≥180 μmol/L 8 (40.0) 7 (16.3) 0.040 Total bilirubin ≥30 μmol/L 9 (45.0) 7 (16.3) 0.015 Concurrent bacteraemia 6 (30.0) 2 (4.7) 0.016 APACHE II score ≥20 15 (75.0) 16 (37.2) 0.005 Septic shock 13 (65.0) 14 (32.6) 0.015 Characteristics Antifungal therapy P value administered before microbiological 0.024 documentation Data are presented as n (%). APACHE, Acute Physiology and Chronic Health Evaluation. 4