structure(list(record_id = c("331-1", "331-2", "332-3"), first_name = c("aa", 
"bb", "cc"), last_name = c("last name 1", "last name 2", NA), 
    address = c(NA, NA, NA), telephone = c(NA, NA, NA), email = c(NA, 
    NA, NA), dob = c(NA, NA, NA), age = c(NA, NA, NA), ethnicity = c(NA, 
    NA, NA), race = c(NA, NA, NA), sex = c(NA, NA, NA), height = c(NA, 
    NA, NA), weight = c(NA, NA, NA), bmi = c(NA, NA, NA), comments = c(NA, 
    NA, NA), demographics_complete = c(2, 2, 0)), row.names = c(NA, 
-3L), class = "data.frame")
