“…[17][18][19][20][21][22] Several other factors inconsistently showed positive associations with breastfeeding duration: having a previous child or children, positive previous breastfeeding experience, breastfeeding confidence, higher social class, higher income, higher socioeconomic status, maternal attitude towards infant feeding, having been breastfed oneself, attendance at childbirth education classes, partner's perceived preference for breastfeeding, and breastfeeding knowledge. [17][18][19][20][21][22] In hospital practice and obstetrics, there were other factors which inconsistently had positive associations such as earlier breastfeeding initiation, rooming-in, early skin-to-skin contact, and encouragement to breastfeed by a health professional. Other potential influences included mastitis and infant birth weight > 2,500 grams.…”