Previous validation of the questionnaire pertained to nutrients including vitamin, antioxidant, and fatty acid intakes (12, 13).
Given that our "skin popping" question in the study questionnaire pertained to intentional "skin popping" it is also possible that participants who injected subcutaneously or intramuscularly by mistake were not captured.
However, section I of the background questionnaire pertains to psychological factors of skill acquisition that provide an opportunity to measure motivation via a newly developed scale hitherto referred to as Readiness to Learn (RtL).
Participants were asked to complete a 1-page self-administered optically scannable questionnaire that pertained to current and previous genital tract discomfort.
Importantly, 7 (35, 46– 52, 52) of the prospective cohorts assessed LCS intake at baseline, and only a few survey or food-frequency questionnaire questions pertained to LCS intake (largely consumption of diet soda).
On the questionnaire, some questions pertained to the subjects' perceptions of the interaction, while other questions pertained more directly to perceptions of the force-feedback device.
Questionnaire variables that only pertained to women having only one lifetime sexual partner were evaluated separately.
The four coping items included in the questionnaire pertain to active and avoidant behaviour, a distinction which is confirmed in studies among older children and adults, but also came forward from the focus group discussions with children.
Using this criterion in the MS questionnaire as well, 16 of 37 items pertained to areas where students and/or faculty saw deficiencies.
The questionnaire included nine multiple choice questions, five of which assessed knowledge regarding general antenatal health, and four which pertained to clinic procedures (see Table 2, full questionnaire in Additional file 4).
