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Table.1 Patient characteristics (n = 232,396)

From: Hospitalization for urinary tract infections in Japan, 2010–2015: a retrospective study using a national inpatient database

  N (%)
Sex
 Female 150,780 64.9
Pregnant 1510 0.6
Age (years)
 15–19 2068 0.9
 20–29 6569 2.8
 30–39 7034 3.0
 40–49 9355 4.0
 50–59 14,345 6.2
 60–69 29,572 12.7
 70–79 56,997 24.5
 80–89 77,409 33.3
 90–99 277,89 12.0
 ≥ 100 1258 0.5
Academic hospital 22,831 9.8
Ambulance use 72,946 31.4
Hospital bed capacity
 20–199 27,796 12.0
 200–299 33,370 14.4
 300–399 54,321 23.4
 400–499 38,716 16.7
 500–599 33,301 14.3
 600–699 19,634 8.4
 ≥ 700 23,512 10.1
 Missing 1746 0.8
Body mass index
 < 18.5 41,631 17.9
 18.5–22.9 85,933 37.0
 23.0–24.9 30,271 13.0
 25.0–29.9 32,023 13.8
 ≥ 30 8405 3.6
 Missing 34,133 14.7
Charlson Comorbidity Index
 0 141,142 60.7
 1 22,954 9.9
 2 49,882 21.5
 3 7616 3.3
 ≥ 4 10,802 4.6
Japan Coma Scale grade on admission
 Grade 0 (alert) 177,491 76.4
 Grade 1 (drowsy) 39,135 16.8
 Grade 2 (somnolent) 11,452 4.9
 Grade 3 (coma) 4312 1.9
Underlying diseases
 Cerebrovascular disease 26,457 11.4
 Dementia 20,655 8.9
 Pneumonia 18,475 7.9
 Sepsis 41,711 17.9
 Diabetes mellitus 45,820 19.7
 Ischemic heart disease 14,857 6.4
 Disseminated intravascular coagulation 8814 3.8
 Heart failure 18,736 8.1
 Renal failure 18,101 7.8
 Chronic respiratory disease 10,115 4.4
 Chronic liver disease 5624 2.4
 Schizophrenia 4980 2.1
 Neuromuscular dysfunction of bladder 13,012 5.6
 Hyperplasia of prostate 14,276 6.1
 Urolithiasis 24,758 10.7
 Malignancies 28,682 12.3
 Urological malignancies 12,828 5.5
 Obstructive and reflux uropathy 28,624 12.3
Therapeutic interventions
 Mechanical ventilation 3644 1.6
 Transurethral stenting 19,177 8.3
 Percutaneous nephrostomy 3781 1.6
 ESWL (Extracorporeal shock wave lithotripsy) 2782 1.2
 Hemodialysis 2881 1.2
 Intensive care unit admission 3578 1.5