Influenza-like illness criteria were poorly related to laboratory-confirmed influenza in a sentinel surveillance study

Navarro-Marí, José María; Pérez-Ruiz, Mercedes; Cantudo-Muñoz, Purificación; Petit-Gancedo, Carmen; Jiménez-Valera, Marı́a; Rosa-Fraile, Manuel

doi:10.1016/j.jclinepi.2004.08.014

Cited by 67 publications

(48 citation statements)

References 17 publications

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“…These studies used incidence figures of 47.7% (aged < 11 years) and 40% (11-17 years) [48], 37% (aged < 3 years) [49], 22.2% (6 months-18 years) [50] and alternating a 20%-30% or 30%-40% range (6 months-14 years) [51]. These incidence figures were based on a much broader definition than used in this review, for example on influenza-like illness, or relied on serologic incidence rates, and therefore can be questioned [13,52].…”

Section: Discussionmentioning

confidence: 99%

Incidence of influenza and associated illness in children aged 0-19 years: a systematic review

et al. 2005

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A systematic review was conducted to estimate the incidence of influenza and concomitant morbidity and mortality in children from 0 to 19 years (0-19 years). Medline was searched for observational studies and placebo or non-treated arms of experimental studies providing occurrence rates of laboratory-proven influenza illness. From the 2758 titles identified, 356 full papers were reviewed based on the abstract or title; after searching their reference lists an additional 16 papers were found. Finally 28 studies met our inclusion criteria, reporting a varying seasonal incidence of influenza of up to 46%. However, when analysing two long-term observational studies and averaging seasonal fluctuations, the overall incidence of influenza was found to range from 5% to 9.5% per year. Serious morbidity was seldom reported and no cases of mortality were found. Our review shows influenza as an infection with a moderate average incidence and a self-limiting character that is associated with mild morbidity and rare cases of mortality in children. This systematic review may be subject to two contrasting biases. First, the limited number of children reported in the literature with proven influenza infections would tend to under-represent the incidence of uncommon but serious complications such as death. Second, the preferential reporting of influenza outbreak seasons may over-estimate the importance of influenza. Future population based studies should focus on consecutive influenza seasons and capture indirect benefits of vaccinations such as interruption of transmission in the community so that preventive strategies for children can be reconsidered with special attention to their cost effectiveness.

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Section: Discussionmentioning

confidence: 99%

Incidence of influenza and associated illness in children aged 0-19 years: a systematic review

et al. 2005

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“…1,2,3,4 ,2,3,4 2,3,4 ,3,4 3, 4 The clinical symptoms of individuals infected with influenza virus, i.e., influenza-like illness (ILI), are not specific. 5 For epidemiological surveillance, the Italian Ministry of Health defined ILI as the presence of three symptom categories: fever over 38˚C, symptoms of the respiratory tract with a sudden and brisk onset, and systemic symptoms. 6 Both categories of influenza vaccines, live and inactivated, effectively and safely reduced the incidence of influenza infections in paediatric age 7,8 and in younger children.…”

Section: Introductionmentioning

confidence: 99%

Cost-Effectiveness of Adjuvanted Influenza Vaccination of Healthy Children 6 to 60 Months of Age

Marchetti

Kühnel

Colombo³

et al. 2007

Human Vaccines

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“…A study in England of spatiotemporal analyses of telehealth data found that fever calls for 5-14-year-old children provided a timely and unique description of the evolution of a national influenza outbreak in England [12]. In studies comparing those with and without positive cultures for influenza virus, fever has been shown repeatedly to have better differentiating ability in comparison with other symptoms or combination of symptoms [18][19][20][21]. Also, patient self-reporting in the ED has been shown to be better than the chief complaint found in the medical chart for predicting the diagnosis made in the emergency room [22].…”

Section: Discussionmentioning

confidence: 99%

Increased emergency department chief complaints of fever identified the influenza (H1N1) pandemic before outpatient symptom surveillance

Shimoni

Rodrig

Dusseldorp

et al. 2011

Environ Health Prev Med

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Objective To determine whether a sentinel clinic network or an emergency department (ED) was more timely in identifying the 2009 influenza A (H1N1) pandemic. Methods All reasons for presenting to the adult regional medical ED were coded online by admission secretaries, without the aid of medical personnel. Increased influenza activity defined by weekly chief complaints of fever was compared with activity defined by the Israel Center for Disease Control (viral surveillance as well as a large sentinel clinic network). Results Influenza activity during the pandemic increased in the ED 2 weeks before outpatient sentinel clinics. During the pandemic, maximal ED activity was much higher than in previous seasons. Maximal activity during the past 5 years correlated with the timeliness of the chief complaint of fever in identifying the onset of epidemics.Conclusion Chief complaint of fever in the ED can be a sensitive marker of increased influenza activity and might replace the use of sentinel clinics.

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Influenza-like illness criteria were poorly related to laboratory-confirmed influenza in a sentinel surveillance study

Cited by 67 publications

References 17 publications

Incidence of influenza and associated illness in children aged 0-19 years: a systematic review

Incidence of influenza and associated illness in children aged 0-19 years: a systematic review

Cost-Effectiveness of Adjuvanted Influenza Vaccination of Healthy Children 6 to 60 Months of Age

Increased emergency department chief complaints of fever identified the influenza (H1N1) pandemic before outpatient symptom surveillance

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