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Table 2 Summary of the study outcome measures and methods

From: Impact of a “vegetables first” approach to complementary feeding on later intake and liking of vegetables in infants: a study protocol for a randomised controlled trial

Variables

Method

Primary outcomes

 Vegetable liking

Liking tool (Appendix A). Completed by mother at home

Rate of acceptance video coding tool. Mother video-records meals. Independent researcher codes infant behaviours

Child vegetable and fruit liking questionnaires. Completed online by mother

 Vegetable intake

Weighed food diary. Completed by mothers at home

FFQ. Completed online by mother

Blood analysisa

 Infant iron studiesb

“Heel prick” test by phlebotomist at Massey University or home

 Infant vitamin D

“Heel prick” test by phlebotomist at Massey University or home using Whatman card

 Mother iron/vitamin D

Venous blood sample collection by phlebotomist at Massey University

Other measures

 Infant anthropometry

Head circumference: paper measuring tape, widest part of head, three measures, select largest measurement to the nearest 0.1 cm; length: infant length board; weight: infant electronic weighing scales, no nappy; measured by researcher at Massey University or participant home

 Demographics

Completed online by mother

 Mother diet

Pregnancy and lactation FFQ and FCQ. Completed online by mother

 Baby eating behaviour

Baby eating behaviour questionnaire [54]. Completed online by mother

 Compliance

2-min check-in questionnaires. Completed online by mother

  1. aAnalysed by LabTests, Auckland
  2. bSerum ferritin, C-reactive protein (CRP), haemoglobin
  3. FFQ food frequency questionnaire, FFQ food frequency questionnaire, FCQ food choices questionnaire