Table 1 Questions asked to mothers during phone interviews

Have you ever breastfed your baby?

If it is yes, how long did you breastfed your baby?

Did you given your milk directly whit nipple or throughout bottle first and then nipple?

Did you remember if your baby has never taken your milk throughout naso-gastric tube? If it yes, how long?

How long baby has taken your milk from bottle?

At what baby’s age did you start breastfeeding?

At what baby’s age did you start bottle-feeding?

At discharge have you given only your milk, or artificial milk, or both, or your milk whit others liquids (like water or chamomille)?

At 1 months of life of baby have you given only your milk, or artificial milk, or both, or your milk whit others liquids (like water or chamomille)?

At 3 months of life of baby have you given only your milk or artificial milk, or both, or your milk with others liquids (like water or chamomille)?