Seasonal Trends in US Asthma Hospitalizations and Mortality

Weiss, Kevin B.

doi:10.1001/jama.1990.03440170045034

Cited by 144 publications

(15 citation statements)

References 19 publications

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“…The presentation of our sarcoidosis cases with the lowest points in both the fall and the winter differs markedly from the seasonal pattern of acute and chronic bronchitis, pneumonia, exacerbation of bronchiectasis and other respiratory tract infections which shows winter predominance (14)(15)(16)(17). Additionally, the seasonal pattern of mood changes as depressive episodes in fall and winter alternate with non-depressed periods in the spring and the summer is completely on the opposite side of the seasonal pattern of sarcoidosis reported by us in this study (18).…”

Section: Discussionmentioning

confidence: 67%

Seasonal variation of the onset of presentations in stage 1 sarcoidosis

Demirkok

Başaranoğlu

Akbilgiç

2006

International Journal of Clinical Practice

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Sarcoidosis is a chronic disease with an unknown aetiology. Our aim was to evaluate the pattern of seasonality of stage 1 sarcoidosis subjects who had symptoms by all cases, by age and by both genders. In this study, we used Roger's test for cyclic variation to prove that this seasonal variation was more than chance. Four hundred ninety-two consecutive patients with sarcoidosis who presented different clinical symptoms were included in this retrospective cohort study. According to the chest X-ray examinations, 185 patients had stage 1, while 307 patients in control group had stage 0, 2, 3 and 4 sarcoidosis. The demographic features, presenting clinical features, course of the disease, initial diagnostic methods and both the month and the age at the initial diagnosis for each patient were analysed on chart reviews. Roger's test for cyclic variation was used to determine the significance of any seasonal variation of incidence. Otherwise, t-test was used. The distribution of cumulative monthly presentations for patients with stage 1 peaked in April (108% above the average) and was lowest in October, November and December (48% below the average) (p < 0.001). Seasonality of the control group peaked in May (84% above the average) and was lowest in August (69% below the average) (p < 0.001). The seasonal pattern of subjects within both groups was influenced by some age groups and by both genders (p < 0.05). Some differences in the amplitude of the seasonal variation by age and by both genders increase the possibility of interactions among age, gender and the disease. Further well-designed and prospective studies are required to better understand the importance of our findings and the pathogenesis of the disease.

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Section: Discussionmentioning

confidence: 67%

Seasonal variation of the onset of presentations in stage 1 sarcoidosis

Demirkok

Başaranoğlu

Akbilgiç

2006

International Journal of Clinical Practice

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“…Distinct peaks in acute asthma frequency were observed in January-February, May, and August each year. Although not as pronounced as those reported in temperate countries (2)(3)(4), the consistent seasonal pattern of peaks in acute asthma despite a tropical climate is of particular interest. It is an indication of "seasons" of potential environmental trigger factors.…”

mentioning

confidence: 76%

Month of birth and childhood atopic diseases in the tropics

Chew

Goh

Teo

et al. 1998

Allergy

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The relationship between the month of birth and prevalence of diagnosed asthma, asthma-like symptoms (wheezing, nocturnal cough, and exercise wheezing), rhinitis, and eczema was investigated in four cohorts each of primary schoolchildren and secondary school (high school) adolescents in Singapore by questionnaire survey. Significantly increased prevalence rates of diagnosed asthma and asthma-like symptoms were observed in certain birth months of the year for two adolescent cohorts, while significant association between birth month and presence of symptoms of rhinitis was found in a cohort of 6-7-year-olds. However, when demographic factors were taken into consideration by multivariate analysis, only the association between asthma, asthma-like symptoms, and birth month remained significant in one of the adolescent cohorts. There was, therefore, only a weak association between the month of birth and atopic disease in our schoolchildren. The overall seasonal trends, however, did show two main seasons (March-May and September-November) associated with higher prevalence of these diseases.

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“…Fleming found that rates for hospital admissions and asthma episodes were highest during September and lowest during August for children in both age groups 0–4 and 5–14 [17]. Weiss reported that hospitalizations peaked between September and November for those age 5–34 years [18]. Khot and Burn also found that admissions peaked in the fall [19].…”

Section: Discussionmentioning

confidence: 99%

Childhood Asthma Utilization Rates in a Nonsmoking Population of Utah Compared to State and National Rates

2011

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Risk factors, such as parental smoking, are commonly associated with increased asthma symptoms and hospitalizations of children. Deseret Mutual Benefits Administrators (DMBA) is the health insurer for employees of The Church of Jesus Christ of Latter-day Saints and their families. Due to religious proscription, employees abstain from alcohol and tobacco use, creating a cohort of children not exposed to parental smoking. Calculation of hospitalization rates for DMBA, Utah, and the US were made in children to compare rates between a nonsmoking population and general populations. Compared to DMBA, rate ratios for asthma hospitalization and emergency department asthma visits were higher for the US and Utah. The incidence of hospital outpatient department and physician office visits was significantly greater for the US population compared to the DMBA. This study demonstrates a decreased need for health services used by children not exposed to second-hand smoke.

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Seasonal Trends in US Asthma Hospitalizations and Mortality

Cited by 144 publications

References 19 publications

Seasonal variation of the onset of presentations in stage 1 sarcoidosis

Seasonal variation of the onset of presentations in stage 1 sarcoidosis

Month of birth and childhood atopic diseases in the tropics

Childhood Asthma Utilization Rates in a Nonsmoking Population of Utah Compared to State and National Rates

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