Table 1 Timeline of questionnaire application by study wave in the multi-center longitudinal study on responsive breastfeeding in China
Online questionnaire content | Wave 1 (1st survey) | Wave 2 (2nd survey) | Wave 3 (3rd survey) | Wave 4 (4th survey) | Wave 5 (5th survey) | Wave 6 (6th survey) |
|---|---|---|---|---|---|---|
within 72 h pp | 1 month pp | 3 months pp | 6 months pp | 9 months pp | 12 months pp | |
Informed consent | Mothers | Mothers | Mothers | Mothers | Mothers | Mothers |
Socio-demographic information | Both | Both | Both | Both | Both | Both |
Knowledge, attitude and practice towards breastfeeding | Mothers | Mothers | Mothers | Mothers | Mothers | Mothers |
Infant feeding style questionnaire (IFSQ) [31] | Mothers | Mothers | Both | Both | Both | Both |
Edinburgh postnatal depression scale (EPDS) [32] | Mothers | Mothers | – | – | – | – |
Emotion regulation questionnaire (ERQ) [33] | Mothers | Mothers | Mothers | Mothers | Mothers | Mothers |
Parenting stress index-short form (PSI-SF) [34] | – | – | – | Mothers | Mothers | Mothers |
Caregiver reported early childhood development instruments (CREDI) [35], reported by mothers | – | – | Infants | Infants | Infants | Infants |