Key result
Self-reported myocardial infarction had a sensitivity of 90.1% and PPV of 78.9%, while self-reported stroke had a sensitivity of 81.1% and PPV of 64.3% compared to hospital discharge data.
Why the study?
Are self-reported myocardial infarction and stroke valid compared to hospital discharge data in Sami and Norwegian populations?
Cross-Sectional (n=16,865)
Yes
Are self-reported myocardial infarction and stroke valid compared to hospital discharge data in Sami and Norwegian populations?
Self-reported myocardial infarction has high sensitivity and moderate PPV, making it suitable for epidemiological studies, whereas self-reported stroke has moderate validity.
Self-reported MI shows acceptable validity for aetiological studies in Sami/Norwegian adults; leaves open stroke questionnaire reliability for precise prevalence estimates.
OBJECTIVE: Updated knowledge on the validity of self-reported myocardial infarction (SMI) and self-reported stroke (SRS) is needed in Norway. Our objective was to compare questionnaire data and hospital discharge data from regions with Sami and Norwegian populations to assess the validity of these outcomes by ethnicity, sex, age and education. DESIGN: Validation study using cross-sectional questionnaire data and hospital discharge data from all Norwegian somatic hospitals. PARTICIPANTS AND SETTING: should read ‘16 865 men and women aged 30 and 36–79 years participated in the first survey of the Population-based Study on Health and Living Conditions in Sami and NorwegianPopulations (the SAMINOR 1 Survey) in 2003–2004. Information on SMI and SRS was available from self-administered questionnaires for 15 005 and 15 088 of these participants, respectively. We compared this information with hospital discharge data from 1994 until SAMINOR 1 Survey attendance. PRIMARY AND SECONDARY OUTCOMES: Sensitivity, specificity, positive predictive value (PPV), negative predictive value and κ. RESULTS: The sensitivity and PPV of SMI were 90.1% and 78.9%, respectively; the PPV increased to 93.1% when all ischaemic heart disease (IHD) diagnoses were included. The SMI prevalence estimate was 2.3% and hospital-based 2.0%. The sensitivity and PPV of SRS were 81.1% and 64.3%, respectively. The SRS prevalence estimate was 1.5% and hospitalisation-based 1.2%. Moderate to no variation was observed in validity according to ethnicity, sex, age and education. CONCLUSIONS: The sensitivity and PPV of SMI were high and moderate, respectively; for SRS, both of these measures were moderate. Our results show that SMI from the SAMINOR 1 Survey may be used in aetiological/analytical studies in this population due to a high IHD-specific PPV. The SAMINOR 1 questionnaire may also be used to estimate the prevalence of acute myocardial infarction and acute stroke.
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Eliassen et al. (2016) conducted a cross-sectional in Myocardial infarction and stroke (n=16,865). Self-reported myocardial infarction and stroke vs. Hospital discharge data was evaluated on Sensitivity, specificity, positive predictive value (PPV), negative predictive value and κ. Self-reported myocardial infarction had a sensitivity of 90.1% and PPV of 78.9%, while self-reported stroke had a sensitivity of 81.1% and PPV of 64.3% compared to hospital discharge data.
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