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Table 1 Overview of patient characteristics for community and hospital-acquired influenza

From: Hospital-acquired influenza in an Australian tertiary Centre 2017: a surveillance based study

Characteristic No. (%) patients  
Community-acquired influenza Hospital-acquired influenza§ p Value
Number of patients 264 28
Age, median [IQR] 76 [62–84] 79 [62–90] 0.624
Female sex 142 (53.8) 10 (35.7) 0.069
Indigenous 4 (1.5) 0 1
Chest X-ray taken 236/259 (91.1) 26 (92.9) 1
Consolidation present on chest X-ray 63/236 (26.7) 5/26 (19.2) 0.41
Influenza type
 Influenza A 169 (64.0) 24 (85.7) 0.021
 Influenza B 95 (36.0) 4 (14.3) 0.021
 Influenza vaccine in 2017 66/97 (60.6) 5/12 (41.7) 0.106
Clinical presentation
 ILI 170 (64.4) 7 (25.0) < 0.001
 Non-ILI 57 (21.6) 21 (75.0) < 0.001
 Pneumonia ± ILI 37 (14.0) 0 0.033
Any comorbidity 214 (89.2) 26 (92.9) 0.191
 Chronic respiratory disease 104/254 (40.9) 5/27 (18.5) 0.023
 Diabetes 57/257 (22.2) 12 (42.9) 0.015
 Malignancy 37/255 (14.5) 8/26 (30.8) 0.046
 Chronic liver disease 11/256 (4.3) 4/27 (14.8) 0.043
 Immunosuppression 24/257 (9.3) 4/27 (14.8) 0.321
 Cardiac disease 94/257 (36.6) 14 (50.0) 0.164
 Obesity 31/154 (20.1) 4/22 (18.2) 1
 Neurological disease 58/258 (22.5) 10/26 (38.5) 0.069
 Chronic renal disease 36/258 (14.0) 4/27 (14.8) 1
Nursing home 41/262 (15.6) 4/27 (14.8) 1
Pregnancy 12/142 (8.5) 1/10 (10.0) 1
Smoking
 Non smoker 60/161 (37.3) 6/16 (37.5) 0.985
 Past smoker 78/161 (48.4) 7/16 (43.8) 0.72
 Current smoker 23/161 (14.3) 3/16 (18.8) 0.709
  1. NOTE: ILI Influenza-like illness, IQR Interquartile range. Denominator is 264 unless otherwise specified. § Denominator is 28 unless otherwise specified