2.2. Diet, Physical Activity and Weight Data Collection
Both the postnatal diet and PA data collection and coding replicated the methods used during the pregnancy phase of the study, which have been published [PA data were collected using the 32-item validated Pregnancy PA Questionnaire (PPAQ), including questions about the type and duration of activity in the previous week [Women were asked to have their weight measured by a health professional at each postnatal questionnaire time point (3-, 6-, 9- and 12-months) to be provided to the research team or to provide a printed copy of their weight measurement from scales in health centres or pharmacies at each time point. We could not access postnatal weight measurements from medical records as these are not routinely collected. We used pregnancy weight measurements to estimate weight change at each postnatal time point from the 1st-trimester booking appointment (mean gestational age 11.2 weeks, SD 4.1) and the 3rd trimester (36 weeks’ gestation). Pregnancy weight data collection methods have been published [