structure(list(record_id = c("331-1", "331-2"), first_name = c("aa", 
"bb"), last_name = c("last name 1", "last name 2"), address = c(NA, 
NA), telephone = c(NA, NA), email = c(NA, NA), dob = c(NA, NA
), age = c(NA, NA), ethnicity = c(NA, NA), race = c(NA, NA), 
    sex = c(NA, NA), height = c(NA, NA), weight = c(NA, NA), 
    bmi = c(NA, NA), comments = c(NA, NA), demographics_complete = c(0, 
    0)), row.names = c(NA, -2L), class = "data.frame")
