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Table 2 Patients’ and epidemics characteristics over the 5 influenza epidemic seasons

From: Effect of a multimodal strategy for prevention of nosocomial influenza: a retrospective study at Grenoble Alpes University Hospital from 2014 to 2019

  2014–2015
N = 202
2015–2016
N = 152
2016–2017
N = 405
2017–2018
N = 464
2018–2019
N = 336
p value
Age in years, median (IQR) 79.93 (56.76–87.66) 71.21 (49.96–81.01) 81.45 (67.35–87.78) 78.45 (64.43–87.49) 79.27 (65.45–86.66) 0.0001*
Male sex, N (%) 86 (42.57) 76 (50.00) 185 (45.68) 218 (46.98) 160 (47.62) 0.677**
Virus type, N (%)
- A 180 (89.11) 72 (47.37) 405 (100.00) 141 (30.39) 336 (100.00)  
- B 17 (8.42) 80 (52.63) 0 (0.00) 323 (69.61) 0 (0.00)
- A/B 5 (2.48) 0 (0.00) 0 (0.00) 0 (0.00) 0 (0.00)  
Nosocomial cases, N (%) 48 (23.76) 36 (23.68) 90 (22.22) 84 (18.10) 89 (26.49) 0.074**
Severity risk factor(s), N (%) NA 118 (78.67) 388 (95.80) 424 (91.38) 324 (96.43) < 0.0001**
Patients vaccination, N (%) NA 52 (41.60) 164 (53.25) 170 (48.02) 128 (53.56) 0.086**
Oseltamivir treatment, N (%) NA 124 (84.35) 356 (88.12) 337 (73.26) 284 (84.52) < 0.0001**
Droplet precautions, N (%) NA 110 (78.57) 282 (70.15) 343 (74.24) 224 (66.67) 0.025**
ICU stay, N (%) NA 18 (15.65) 49 (12.10) 42 (9.05) 35 (10.42) 0.173**
Death, N (%) NA 4 (3.96) 37 (9.14) 33 (7.11) 12 (3.57) 0.014**
  1. Table describes the patients’ and epidemics characteristics over the 5 influenza epidemic seasons considered from 2014 to 2019, at Grenoble Alpes University Hospital
  2. Bold is used to highlight statistically significant results
  3. IQR interquartile range, ICU intensive care unit
  4. *Kruskal–Wallis test; **Khi-2 test