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Cardiovascular Disease (CVD) family history

Source: R/family-history.R
determine_CVD_Family_History.Rd

This function evaluates a respondent's family history of cardiovascular disease (CVD), based on data about diagnoses of heart disease and stroke in immediate family members and the ages at which these diagnoses occurred. It identifies premature CVD if any diagnosis occurred before age 60.

Usage

determine_CVD_family_history(FMH_11, FMH_12, FMH_13, FMH_14)

Arguments

FMH_11

Integer: Indicates whether an immediate family member was diagnosed with heart disease. - 1 for "Yes" - 2 for "No".

FMH_12

Numeric: Represents the youngest age at diagnosis of heart disease in an immediate family member.

FMH_13

Integer: Indicates whether an immediate family member was diagnosed with stroke. - 1 for "Yes" - 2 for "No".

FMH_14

Numeric: Represents the youngest age at diagnosis of stroke in an immediate family member.

Value

An integer indicating the CVD family history:

  • 1: "Yes" — Family history of premature CVD exists (diagnosis before age 60).

  • 2: "No" — No family history of premature CVD.

  • NA(b): Missing/unknown — Due to non-responses, invalid inputs, or unknown diagnosis ages.

Details

  • If both FMH_11 (heart disease history) and FMH_13 (stroke history) are NA, the function returns NA(b).

  • If either FMH_11 or FMH_13 indicates a diagnosis (1 for "Yes"), the corresponding age (FMH_12 for heart disease and FMH_14 for stroke) is evaluated:

    • Ages between 0 and 59 indicate premature CVD.

    • Ages between 60 and 100 indicate late-onset CVD.

    • Ages outside this range or invalid inputs (997, 998, 999) result in NA(b).

  • If both FMH_11 and FMH_13 are 2 ("No"), there is no family history of CVD (2).

  • Any invalid inputs for FMH_11 or FMH_13 (values greater than 2) also result in NA(b).

Examples

# Example 1: Premature CVD due to heart disease diagnosis at age 50
determine_CVD_family_history(FMH_11 = 1, FMH_12 = 50, FMH_13 = 2, FMH_14 = NA)
#> [1] 1
# Output: 1