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Table 1 Outline of measures and when they will be performed

From: Methodology and recruitment for a randomised controlled trial to evaluate the safety of wahakurafor infant bedsharing

  Age of child
  Pregnancy 1 month 3 months 6 months
Maternal and family demographics1 X - - -
Maternal smoking status X X - -
Maternal alcohol and recreational drug use2 X X - -
Baby urinary cotinine   X   
Maternal salivary oxytocin and cotinine X X X -
Perinatal variables - X - -
Sleep study - X - -
Breastfeeding status - X X X
Dummy use - X X X
Frequency and duration bedsharing - X X X
Use of well-child/primary care and secondary care services - X X X
Environmental chaos3 X - - -
Social support4 X - X  
Social and economic stress5 X - X X
Maternal depression6 X - X X
Beliefs about infant care7 X - X -
Attachment and parenting adaptation8 X - X -
Mind-mindedness9 X - X X
  1. 1Family structure, maternal education, combined family income, ethnicity, type of accommodation, number of bedrooms.
  2. 2Derived from the Australian national drug strategy household survey [42] and Australian health survey 2001 [43].
  3. 3Confusion, Hubub and Order Scale [44].
  4. 4NSW Child Health Survey [45].
  5. 5Measures used in POI.nz study (original source lost) [46]. Economic stress as utilised by the Welsh Family & School Transition Project 2001 (Harold, G., Personal Communication, June, 2007).
  6. 6Edinburgh Postnatal Depression Scale [47].
  7. 7Questions designed by the authors to measure beliefs about infant care.
  8. 8Attachment and Adaptation Scales from the Parenting Stress Index [48].
  9. 9Questions designed by the authors to measure mind-mindedness. We will also code a 5 minute audio recording of each mother talking freely about her baby.