Calculate estimated fetal weight for gestational age centiles and z-scores

Usage

calculate_efw_gestage(gestage = NULL, ac = NULL, hc = NULL)

Arguments

gestage: Gestational age. Gestational age can be provided as a string with a format of weeks+days or as numeric of exact weeks in decimal format
ac: Abdominal circumference in centimetres
hc: Head circumference in centimetres

Value

A list of 6 elements containing 1) estimated fetal weight in grams based on abdominal circumference and head circumference; 2) skewness of gestational age; 3) mean gestational age; 4) coefficient of variation of gestational age; 5) estimated fetal weight-for-gestational age z-score; and, 6) estimated fetal weight-for-gestational age centile.

Examples

calculate_efw_gestage(gestage = "30+0", ac = 26, hc = 29)
#> $`Estimated fetal weight (grams)`
#> [1] 1498.608
#> 
#> $Skewness
#> [1] -0.4451729
#> 
#> $Mean
#> [1] 7.241468
#> 
#> $`Coefficient of variation`
#> [1] 0.01751704
#> 
#> $`z-score`
#> [1] 0.5544184
#> 
#> $centile
#> [1] 0.7103537
#>