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Assessing the impact on caregivers of patients with schizophrenia: psychometric validation of the Schizophrenia Caregiver Questionnaire (SCQ)

Overview of attention for article published in BMC Psychiatry, July 2016
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Title
Assessing the impact on caregivers of patients with schizophrenia: psychometric validation of the Schizophrenia Caregiver Questionnaire (SCQ)
Published in
BMC Psychiatry, July 2016
DOI 10.1186/s12888-016-0951-1
Pubmed ID
Authors

Diana Rofail, Antoine Regnault, Stéphanie le Scouiller, Jérémy Lambert, Steven H. Zarit

Abstract

The Schizophrenia Caregiver Questionnaire (SCQ) was developed to assess the impact on caregivers of caring for patients with schizophrenia. The objective of this study was to develop a scoring algorithm for the SCQ, and evaluate its measurement properties. The SCQ was administered to 358 caregivers of patients with schizophrenia included in the observational PATTERN study of stabilized patients with persistent symptoms of schizophrenia receiving outpatient care. SCQ item selection and creation of scores were based on exploration of item response distribution, factor analyses, and Rasch model. Construct validity, reliability, and ability to detect change of the SCQ scores were investigated. The final questionnaire comprised a 'Humanistic impact' supra-domain composed of a global score and four subdomain scores ('Physical'; 'Emotional'; 'Social'; 'Daily life'), and eight other domain scores related to the caregiving role ('Exhaustion with caregiving'; 'Feeling alone'; 'Patient Dependence'; 'Worries for the patient'; 'Perception of caregiving'; 'Financial dependence of the patient'; 'Financial impact of caregiving'; 'Overall difficulty of caregiving'). Two items from the SCQ were deleted. SCQ scores showed very good construct validity: Item convergent/discriminant validity were satisfactory; SCQ scores of caregivers of patients with more severe symptoms were higher indicating more impact (p < 0.05 for all scores); SCQ scores were meaningfully associated with measures of schizophrenia severity (PANSS and PSP) and caregivers' Health-Related Quality of Life (Medical Outcome Survey Short Form 36 items). The SCQ Humanistic impact supra-domain scores demonstrated very good internal consistency reliability (Cronbach's alphas between 0.80 and 0.96) and test-retest reliability (Intraclass Coefficient correlations ranging from 0.75 and 0.87); Other SCQ domain scores showed lower but still acceptable reliability coefficients. SCQ scores clearly increased for caregivers of patients whose schizophrenia worsened. Overall, the 30-item SCQ demonstrated very good measurement properties supporting its relevance to comprehensively measure the experience of caregivers of patients with schizophrenia.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 82 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 1 1%
Unknown 81 99%

Demographic breakdown

Readers by professional status Count As %
Student > Master 13 16%
Student > Bachelor 10 12%
Student > Postgraduate 7 9%
Lecturer 6 7%
Student > Doctoral Student 4 5%
Other 14 17%
Unknown 28 34%
Readers by discipline Count As %
Psychology 15 18%
Nursing and Health Professions 15 18%
Medicine and Dentistry 9 11%
Neuroscience 3 4%
Biochemistry, Genetics and Molecular Biology 2 2%
Other 5 6%
Unknown 33 40%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 2. 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 05 August 2017.
All research outputs
#15,434,148
of 25,260,058 outputs
Outputs from BMC Psychiatry
#3,420
of 5,396 outputs
Outputs of similar age
#214,166
of 372,914 outputs
Outputs of similar age from BMC Psychiatry
#75
of 115 outputs
Altmetric has tracked 25,260,058 research outputs across all sources so far. This one is in the 38th percentile – i.e., 38% of other outputs scored the same or lower than it.
So far Altmetric has tracked 5,396 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 13.3. This one is in the 35th percentile – i.e., 35% 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 372,914 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 41st percentile – i.e., 41% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 115 others from the same source and published within six weeks on either side of this one. This one is in the 35th percentile – i.e., 35% of its contemporaries scored the same or lower than it.