The questionnaire contained 90 items in total. To investigate the reasons why some pregnant women refused involvement in the study an 18 item ‘refusal to participate’ questionnaire was developed. The questionnaire contained only simple yes ⁄ no responses, so as to not discourage a response. Space was also allowed for women refusing to participate to
express their views. The ‘child’s oral health survey’ questionnaire administered for the planned 18 month follow-up focused on feeding practices, oral hygiene, sleeping patterns, nonnutritional eating habits, teething and general health of the child. To evaluate the intervention, the mothers in the test group completed an ‘evaluation of oral health intervention’ questionnaire, consisting of 21 items, concerned with the content, usefulness, credibility, readability and impact of the written material.