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Effectiveness of influenza vaccination in the elderly in a community in Italy.
Eur J Epidemiol. 2001; 17(2):163-8.EJ

Abstract

OBJECTIVES

Assess the effectiveness of influenza vaccination in reducing hospitalization due to pneumonia and influenza among elderly subjects in a community in central Italy. Estimate the hospitalization fraction preventable by extending the vaccination program.

METHODS

Case-control study. Cases were subjects aged 65+ at hospital admission (1 December 1994-31 March 1995). For each case two population controls were randomly chosen, matched by sex, age and residence. Variables of interest were recorded through a postal questionnaire and telephone interview. A matched-set analysis was carried out adjusting for concomitant chronic diseases, education, type of home heating, and smoking habits. The preventable fraction of hospitalization was computed through the application of the attributable risk estimate. The setting was 33 municipalities in central Italy including 169,370 residents aged 65 years or more.

RESULTS

Two hundred and seventy-five cases 550 controls were analyzed. Influenza vaccination was effective in preventing 33% of hospitalization due to pneumonia/influenza. The fraction of hospital admissions preventable by extending the vaccination was 17%. When the analysis was limited to self-respondents to the questionnaire (excluding next-of-kin) and to pneumonia/influenza as primary discharge diagnosis, protection from hospitalization by vaccination almost reached 50%, a better result in comparison with most case-control studies.

CONCLUSIONS

Influenza vaccination was shown to be successful in reducing hospital admissions due to pneumonia and influenza. A large number of hospitalizations could be reduced extending the vaccination campaign.

Authors+Show Affiliations

U.O. Epidemiologia, Presidio per la Prevenzione Oncologica, Azienda Ospedaliera Careggi, Firenze, Italy. e.crocetti@cspo.itNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11599691

Citation

Crocetti, E, et al. "Effectiveness of Influenza Vaccination in the Elderly in a Community in Italy." European Journal of Epidemiology, vol. 17, no. 2, 2001, pp. 163-8.
Crocetti E, Arniani S, Bordoni F, et al. Effectiveness of influenza vaccination in the elderly in a community in Italy. Eur J Epidemiol. 2001;17(2):163-8.
Crocetti, E., Arniani, S., Bordoni, F., Maciocco, G., Zappa, M., & Buiatti, E. (2001). Effectiveness of influenza vaccination in the elderly in a community in Italy. European Journal of Epidemiology, 17(2), 163-8.
Crocetti E, et al. Effectiveness of Influenza Vaccination in the Elderly in a Community in Italy. Eur J Epidemiol. 2001;17(2):163-8. PubMed PMID: 11599691.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effectiveness of influenza vaccination in the elderly in a community in Italy. AU - Crocetti,E, AU - Arniani,S, AU - Bordoni,F, AU - Maciocco,G, AU - Zappa,M, AU - Buiatti,E, PY - 2001/10/16/pubmed PY - 2002/1/24/medline PY - 2001/10/16/entrez SP - 163 EP - 8 JF - European journal of epidemiology JO - Eur J Epidemiol VL - 17 IS - 2 N2 - OBJECTIVES: Assess the effectiveness of influenza vaccination in reducing hospitalization due to pneumonia and influenza among elderly subjects in a community in central Italy. Estimate the hospitalization fraction preventable by extending the vaccination program. METHODS: Case-control study. Cases were subjects aged 65+ at hospital admission (1 December 1994-31 March 1995). For each case two population controls were randomly chosen, matched by sex, age and residence. Variables of interest were recorded through a postal questionnaire and telephone interview. A matched-set analysis was carried out adjusting for concomitant chronic diseases, education, type of home heating, and smoking habits. The preventable fraction of hospitalization was computed through the application of the attributable risk estimate. The setting was 33 municipalities in central Italy including 169,370 residents aged 65 years or more. RESULTS: Two hundred and seventy-five cases 550 controls were analyzed. Influenza vaccination was effective in preventing 33% of hospitalization due to pneumonia/influenza. The fraction of hospital admissions preventable by extending the vaccination was 17%. When the analysis was limited to self-respondents to the questionnaire (excluding next-of-kin) and to pneumonia/influenza as primary discharge diagnosis, protection from hospitalization by vaccination almost reached 50%, a better result in comparison with most case-control studies. CONCLUSIONS: Influenza vaccination was shown to be successful in reducing hospital admissions due to pneumonia and influenza. A large number of hospitalizations could be reduced extending the vaccination campaign. SN - 0393-2990 UR - https://www.unboundmedicine.com/medline/citation/11599691/Effectiveness_of_influenza_vaccination_in_the_elderly_in_a_community_in_Italy_ L2 - http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=11599691.ui DB - PRIME DP - Unbound Medicine ER -