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An evaluation of variation in published estimates of schizophrenia prevalence from 1990─2013: a systematic literature review

Overview of attention for article published in BMC Psychiatry, August 2015
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  • Good Attention Score compared to outputs of the same age (65th percentile)

Mentioned by

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10 tweeters

Citations

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108 Dimensions

Readers on

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261 Mendeley
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Title
An evaluation of variation in published estimates of schizophrenia prevalence from 1990─2013: a systematic literature review
Published in
BMC Psychiatry, August 2015
DOI 10.1186/s12888-015-0578-7
Pubmed ID
Authors

Jason C. Simeone, Alexandra J. Ward, Philip Rotella, Jenna Collins, Ricarda Windisch

Abstract

There is a lack of consistency in findings across studies on the prevalence of schizophrenia, and no recent systematic review of the literature exists. The purpose of this study is to provide an updated systematic review of population-based prevalence estimates and to understand the factors that could account for this variation in prevalence estimates. MEDLINE, Embase, and PsycInfo databases were searched for observational studies describing schizophrenia prevalence in general populations from 2003-2013 and supplemented by studies from a prior review covering 1990-2002. Studies reporting prevalence estimates from specialized populations such as institutionalized, homeless, or incarcerated persons were excluded. Prevalence estimates were compared both across and within studies by factors that might contribute to variability using descriptive statistics. Sixty-five primary studies were included; thirty-one (48 %) were from Europe and 35 (54 %) were conducted in samples of ≥50,000 persons. Among 21 studies reporting 12-month prevalence, the median estimate was 0.33 % with an interquartile range (IQR) of 0.26 %-0.51 %. The median estimate of lifetime prevalence among 29 studies was 0.48 % (IQR: 0.34 %-0.85 %). Prevalence across studies appeared to vary by study design, geographic region, time of assessment, and study quality scores; associations between study sample size and prevalence were not observed. Within studies, age-adjusted estimates were higher than crude estimates by 17 %-138 %, the use of a broader definition of schizophrenia spectrum disorders compared to schizophrenia increased case identification by 18 %-90 %, identification of cases from inpatient-only settings versus any setting decreased prevalence by 60 %, and no consistent trends were noted by differing diagnostic criteria. This review provides updated information on the epidemiology of schizophrenia in general populations, which is vital information for many stakeholders. Study characteristics appear to play an important role in the variation between estimates. Overall, the evidence is still sparse; for many countries no new studies were identified.

Twitter Demographics

The data shown below were collected from the profiles of 10 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 261 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United Kingdom 2 <1%
United States 2 <1%
Belgium 1 <1%
Brazil 1 <1%
Unknown 255 98%

Demographic breakdown

Readers by professional status Count As %
Student > Master 47 18%
Student > Ph. D. Student 44 17%
Student > Bachelor 32 12%
Researcher 29 11%
Student > Postgraduate 26 10%
Other 54 21%
Unknown 29 11%
Readers by discipline Count As %
Medicine and Dentistry 83 32%
Psychology 56 21%
Neuroscience 14 5%
Social Sciences 14 5%
Nursing and Health Professions 13 5%
Other 41 16%
Unknown 40 15%

Attention Score in Context

This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 20 February 2016.
All research outputs
#4,435,624
of 14,535,828 outputs
Outputs from BMC Psychiatry
#1,648
of 3,293 outputs
Outputs of similar age
#72,914
of 236,229 outputs
Outputs of similar age from BMC Psychiatry
#1
of 1 outputs
Altmetric has tracked 14,535,828 research outputs across all sources so far. This one is in the 49th percentile – i.e., 49% of other outputs scored the same or lower than it.
So far Altmetric has tracked 3,293 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 10.4. This one is in the 48th percentile – i.e., 48% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 236,229 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 65% of its contemporaries.
We're also able to compare this research output to 1 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them