When question codes are used instead of question text, index or question number is used along with the question code. This index or question number will display as 0 if the question is presentation text or display only type question without any data associated. For example, you have Q1-Gender, Q2-Age, Q3-PresentationText, Q4-TextFeedback, Q5-email_address, then the question codes in raw data will display as: 1-Q1, 2-Q2, 0-Q3, 3-Q4, 4-Q5