Evidence map›Paper›PMID 11580873›Full record

ArticleBMC health services research2001

A population based time series analysis of asthma hospitalisations in Ontario, Canada: 1988 to 2000.

E J Crighton, M M Mamdani, R E Upshur

Abstract read
In one paragraph

Article in BMC health services research, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Diabetic Ketoacidosis in Northern Jordan: Seasonal Morbidity and Characteristics of Patients.Diabetes, metabolic syndrome and obesity : targets and therapy · 2023
    Article
  3. Article
  4. Article
  5. Article
  6. A spatial analysis of asthma prevalence in Ontario.Canadian journal of public health = Revue canadienne de sante publique · 2012
    Article
  7. Article
  8. The anti-vaccination movement and resistance to allergen-immunotherapy: a guide for clinical allergists.Allergy, asthma, and clinical immunology : official journal of the Canadian Society of Allergy and Clinical Immunology · 2010
    Article
  9. Article
  10. Article
  11. Article
  12. Antimicrobial strategies: an option to treat allergy?Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie · 2007
    Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. The seasonality of total hospitalizations in Ontario by age and gender: a time series analysis.Canadian journal of public health = Revue canadienne de sante publique
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

E J CrightonPrimary Care Research Unit, Room E-354 Sunnybrook & Women's College Health Sciences Centre, Department of Family and Community Medicine and Public Health Sciences, University of Toronto, Toronto, Ontario, Canada. eric.crighton@swchsc.on.ca
M M Mamdani
R E Upshur

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAsthma is a common yet incompletely understood health problem associated with a high morbidity burden. A wide variety of seasonally variable environmental stimuli such as viruses and air pollution are believed to influence asthma morbidity. This study set out to examine the seasonal patterns of asthma hospitalisations in relation to age and gender for the province of Ontario over a period of 12 years.

methodsA retrospective, population-based study design was used to assess temporal patterns in hospitalisations for asthma from April 1, 1988 to March 31, 2000. Approximately 14 million residents of Ontario eligible for universal healthcare coverage during this time were included for analysis. Time series analyses were conducted on monthly aggregations of hospitalisations.

resultsThere is strong evidence of an autumn peak and summer trough seasonal pattern occurring every year over the 12-year period (Fisher-Kappa (FK) = 23.93, p > 0.01; Bartlett Kolmogorov Smirnov (BKS) = 0.459, p < 0.01). This pattern was observed in both sexes. However, young males (0-4 years) were hospitalised at two to three times the rate of females of the same age. Rates were much lower in the older age groups. A downward trend in asthma hospitalisations was observed in the total population over the twelve-year period (beta = -0.980, p < 0.01).

conclusionsA clear and consistent seasonal pattern was observed in this study for asthma hospitalisations. These findings have important implications for the development of effective management and prevention strategies.

Indexed as

SeasonsAdolescentAge DistributionAsthmaChildChild, PreschoolFemaleHospitalizationHumansInfantInfant, NewbornInternational Classification of DiseasesMaleOntarioRetrospective StudiesSex Distribution

Identifiers

PMID11580873
PMCPMC57008

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.