Time trends in autism and in MMR immunization coverage in California

Citation

Evidence Type: Research (Data Analysis)
Dales L, Hammer SJ, Smith NJ. Time trends in autism and in MMR immunization coverage in California. JAMA. 2001;285(9):1183–5 - Time trends in autism and in MMR immunization coverage in California. - PubMed - NCBI Score: 0.0/0.0

Discussion

The research look at incidence of MMR vaccination and rates of autism diagnoses in California in the period from 1980 to 1994 and found no correlation between MMR vaccination rates and rates of autism diagnoses.

Strengths/Weaknesses

Conclusions

Strength/Weakness 1

Strong strength: Adequate Sample Size

This research covers a large population over a long period of time resulting in it spanning thousands of diagnoses of autism.


Strength/Weakness 2

Mild strength: Well Designed Research

The research analysed its data sources to identify any possible weak points or inconsistancies in the data.


Strength/Weakness 3

Funding appears to have come from the California Department of Health Services, which will be interested in health outcomes, not in selling vaccines.


Conclusion 1

The research found no link between the MMR vaccine and autism diagnoses.


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