Table 2

Total number of inpatients with severe influenza complications by department and hospital type among 16 636 913 Japanese influenza cases between 2012 and 2016

CategoryInpatientsAcute respiratory failurePneumoniaARDSFebrile seizureEncephalitis/encephalopathy
 n164 394336127 253182603159
Clinical department, n (%)
 Internal medicine23 722 (14.4)682 (20.3)3633 (13.3)623 (0.9)57 (35.8)
 Paediatrics47 138 (28.7)1794 (53.4)19 012 (69.8)22461 (94.5)63 (39.6)
 Otorhinolaryngology12 825 (7.8)43 (1.3)217 (0.8)02 (0.1)0
 Orthopaedics7158 (4.4)43 (1.3)338 (1.2)06 (0.2)0
 Dermatology1100 (0.7)3 (0.1)45 (0.2)000
 Surgery17 138 (10.4)189 (5.6)720 (2.6)318 (0.7)0
 Ophthalmology2302 (1.4)023 (0.1)01 (0.04)0
 Obstetrics and gynaecology15 155 (9.2)88 (2.6)330 (1.2)000
 Psychiatry2486 (1.5)28 (0.8)197 (0.7)08 (0.3)37 (23.3)
 Others or not specified35 370 (21.5)486 (14.5)2738 (10.0)084 (3.2)2 (1.3)
Hospital beds, n (%)
 0–1916 843 (10.2)167 (5.0)805 (3.0)018 (0.7)0
 20–9910 202 (6.2)106 (3.2)913 (3.4)336 (1.4)0
 100–19912 661 (7.7)308 (9.2)2394 (8.8)0147 (5.6)0
 200–29915 701 (9.6)358 (10.7)2933 (10.8)7220 (8.5)26 (16.4)
 300–49940 753 (24.8)922 (27.5)9179 (33.7)01003 (38.5)57 (35.8)
 500+68 234 (41.5)1500 (44.7)11 029 (40.5)81179 (45.3)76 (47.8)
Hospital type, n (%)
 Clinic16 817 (10.2)167 (5.0)805 (3.0)018 (0.7)0
 National or municipal hospital48 243 (29.3)985 (29.4)10 995 (40.3)101314 (50.5)82 (51.6)
 University hospital21 898 (13.3)285 (8.5)2049 (7.5)0162 (6.2)34 (21.4)
 Other hospital77 185 (47.0)1919 (57.2)13 404 (49.2)81109 (42.6)43 (27.0)
 Not specified251 (0.2)5 (0.1)0000
  • ARDS, acute respiratory distress syndrome.