structure(list(participant_id = c(1, 2), redcap_survey_identifier = c(NA, 
NA), prescreening_survey_timestamp = structure(c(1520351563, 
1520351595), class = c("POSIXct", "POSIXt"), tzone = "UTC"), 
    dob = structure(c(17596, 17595), class = "Date"), email = c("aaa@bbb.com", 
    "ccc@ddd.com"), has_diabetes = c(1, 0), consent___1 = c(1, 
    0), prescreening_survey_complete = c(2, 2), participant_info_survey_timestamp = c(NA, 
    NA), first_name = c(NA, NA), last_name = c(NA, NA), address = c(NA, 
    NA), telephone_1 = c(NA, NA), ethnicity = c(NA, NA), race = c(NA, 
    NA), sex = c(NA, NA), height = c(NA, NA), weight = c(NA, 
    NA), participant_info_survey_complete = c(0, 0), participant_morale_questionnaire_timestamp = c(NA, 
    NA), pmq1 = c(NA, NA), pmq2 = c(NA, NA), pmq3 = c(NA, NA), 
    pmq4 = c(NA, NA), participant_morale_questionnaire_complete = c(0, 
    0), complete_study = c(NA, NA), withdraw_date = c(NA, NA), 
    withdraw_reason = c(NA, NA), date_visit_4 = c(NA, NA), discharge_date_4 = c(NA, 
    NA), discharge_summary_4 = c(NA, NA), study_comments = c(NA, 
    NA), completion_data_complete = c(0, 0)), row.names = c(NA, 
-2L), class = "data.frame")
