More than 50% of the total sample identified as white. Over half of all respondents have at least some college education. Most of the respondents had an annual family income of US $35,000 to US $74,999. Almost three-fourths of the respondents reported still smoking at the time of survey administration. As seen in Table 2, demographics varied widely across platforms. A substantial variation in the proportion of currently smoking respondents (vs recently quit during this pregnancy) existed: from 8% of Qualtrics respondents to 88% of Reddit respondents.