Monthly number of stillbirths in Australia from 1998 to 2000. It is a rare event; there are 352 stillbirths out of 60,110 births. To preserve confidentiality the day of birth has been randomly re-ordered.
Format
A data frame with 60,110 observations on the following 7 variables:
dob: date of birth (year-month-day)
year: year of birth
month: month of birth
yrmon: a combination of year and month: \(year+(month-1)/12\)
seifa: SEIFA score, an area level measure of socioeconomic status in quintiles
gestation: gestation in weeks
stillborn: stillborn (yes/no); 1=Yes, 0=No
Examples
table(stillbirth$month, stillbirth$stillborn)
#>
#> 0 1
#> 1 4883 37
#> 2 4603 30
#> 3 5409 36
#> 4 4926 27
#> 5 5096 33
#> 6 5013 23
#> 7 5214 26
#> 8 5075 25
#> 9 5154 26
#> 10 5050 25
#> 11 4650 32
#> 12 4685 32