Table 2

Validity of self-reported myocardial infarction in participants aged 30 and 36–79 years by ethnicity, sex, age and education. The SAMINOR 1 Survey (2003–2004) and the CVDNOR project, n=15 005.

 PAS†SensitivitySpecificityPPVNPVκ
Self-reported myocardial infarctionYesNo(95% CI)(95% CI)(95% CI)(95% CI)(95% CI)
Total
 Yes2737390.1%99.5%78.9%99.8%0.84
No3014 629(86.2 to 93.2)(99.4 to 99.6)(74.2 to 83.1)(99.7 to 99.9)(0.81 to 0.87)
Ethnicity‡
 SamiYes912890.1%99.4%76.5%99.8%0.82
No104834(82.5 to 95.1)(99.2 to 99.6)(67.8 to 83.8)(99.6 to 99.9)(0.77 to 0.88)
 Non-Sami§Yes1744491.1%99.5%79.8%99.8%0.85
No179311(86.1 to 94.7)(99.4 to 99.7)(73.9 to 84.9)(99.7 to 99.9)(0.81 to 0.89)
Sex
 WomenYes731989.0%99.8%*79.3%99.9%*0.84
No97771(80.2 to 94.9)(99.6 to 99.9)(69.6 to 87.1)(99.8 to 99.9)(0.78 to 0.90)
 MenYes2005490.5%99.2%78.7%99.7%0.84
No216858(85.8 to 94.0)(99.0 to 99.4)(73.2 to 83.6)(99.5 to 99.8)(0.80 to 0.87)
Age
 30–59 yearsYes852896.6%*99.7%*75.2%100%*0.84
No310 265(90.4 to 99.3)(99.6 to 99.8)(66.2 to 82.9)(99.9 to 100)(0.79 to 0.90)
 60–79 yearsYes1884587.4%99.0%80.7%99.4%0.83
No274364(82.3 to 91.6)(98.6 to 99.3)(75.0 to 85.6)(99.1 to 99.6)(0.79 to 0.87)
Education¶
 0–11 yearsYes1954987.8%99.4%*79.9%99.7%*0.83
No277688(82.8 to 91.8)(99.2 to 99.5)(74.3 to 84.8)(99.5 to 99.8)(0.80 to 0.87)
 ≥12 yearsYes491794.2%99.7%74.2%1000.83
No36113(84.1 to 98.8)(99.6 to 99.8)(62.0 to 84.2)(99.9 to 100)(0.76 to 0.90)
  • *p<0.05, Column-specific Pearson's χ2 test for difference between the two categories of each variable.

  • †Includes primary or secondary discharge diagnoses of ICD-9: 410; ICD-10: I21, I22 from the PAS of all Norwegian somatic hospitals from 1994 through SAMINOR 1 attendance.

  • ‡Smaller n due to missing values: n=496.

  • §No Sami identity marks reported.

  • ¶Smaller n due to missing values: n=864.

  • CVDNOR, Cardiovascular Disease in Norway; ICD-9, International Classification of Diseases, Ninth Revision; ICD-10, International Classification of Diseases, Tenth Revision; NPV, negative predictive value; PAS, Patient Administrative Systems; PPV, positive predictive value.