Skip to main content

Table 3 Crude and "corrected" rates of hypertensive disorders as reported in the Midwives Data collection (MDC) and Inpatients Statistics Collection (ISC)

From: Methods for dealing with discrepant records in linked population health datasets: a cross-sectional study

Dataset

Reported Prevalence (%)

95% CI

Estimated PPV %

Estimated sensitivity %

"Corrected" prevalence‡

 

Chronic hypertension

MDC

1.02

0.98, 1.06

55.6*

62.5*

0.91

ISC

0.56

0.53, 0.59

85.7†

85.7†

0.56

 

Pregnancy hypertension

MDC

6.38

6.29, 6.48

90.1*

66.7*

8.61

ISC

7.50

7.40, 7.61

81.0†

58.6†

9.11

  1. * Positive predictive value (PPV) and sensitivity estimates from a previous validation study of 1680 women [22]
  2. † PPV and sensitivity estimates from a previous validation study of 490 women [23]
  3. ‡ "corrected" prevalence = reported prevalence × PPV/sensitivity
  4. 95% CI = 95 percent confidence interval