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-   -   How may I calculate the confidence interval of the mean of several incidences ? (https://www.askmehelpdesk.com/showthread.php?t=554032)

  • Feb 13, 2011, 10:06 AM
    mmortazavi
    How may I calculate the confidence interval of the mean of several incidences ?
    How may I calculate the confidence interval of the mean of several incidences each have a confidence interval?
    Example: Incidence of DVT in patients with lower limb erysipelas
    Patients DVT DVT%
    43 3 6.9 (1.5–19.1)
    40 6 15 (5.7–29.8)
    10 0 0 (0.0–30.9)
    155 4 2.6 (0.7–6.5)
    30 3 10 (2.1–26.5)
    Figures in parentheses are 95% confidence intervals. Ponderated incidence with 95% confidence interval:
    5.8% (3.3–9.2).

    How they have calculated the Confidence Interval: 3.3 - 9.2?

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