Influenza- and respiratory syncytial virus-associated mortality and hospitalisations.
The aim of the current study was to estimate influenza- and respiratory syncytial virus (RSV)-associated mortality and hospitalisations, especially the influenza-associated burden among low-risk individuals < or =65 yrs old, not yet recommended for influenza vaccination in many European countries. Retrospectively during 1997-2003, Dutch national all-cause mortality and hospital discharge figures and virus surveillance data were used to estimate annual average influenza- and RSV-associated excess mortality and hospitalisation using rate difference methods. Influenza virus active periods were significantly associated with excess mortality among 50-64-yr-olds and the elderly, but not in younger age categories. Influenza-associated hospitalisation was highest and about equal for 0-1-yr-olds and the elderly, and also significant for low-risk adults. Hospitalisation among children was mostly due to respiratory conditions, and among adults cardiovascular complications were frequent. RSV-active periods were associated with excess mortality and hospitalisation among the elderly. The highest RSV-related excess hospitalisation was found in 0-1-yr-olds. Influenza-associated mortality was demonstrated in 50-64-yr-olds. Among low-risk individuals < or =65 yrs of age, influenza-associated hospitalisation rates were highest for 0-4-yr-olds, but also significant for 5-64-yr-olds. These data may further support extension of recommendations for influenza vaccination to include younger low-risk persons. The respiratory syncytial virus-associated burden was highest for young children but also substantial for the elderly.
Jansen
A G S C
AG
Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands.
Sanders
E A M
EA
Hoes
A W
AW
van Loon
A M
AM
Hak
E
E
D000293:Adolescent; D017677:Age Distribution; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006760:Hospitalization; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007251:Influenza, Human / Q000453:epidemiology / Q000401:mortality*; D008297:Male; D008875:Middle Aged; D009426:Netherlands / Q000453:epidemiology; D018357:Respiratory Syncytial Virus Infections / Q000453:epidemiology / Q000401:mortality*; D012136:Respiratory Syncytial Viruses; D012621:Seasons