Projected and observed exclusive breastfeeding for age groups 12–13 to 34–35 months of age, with reference lines of 10% (short dashes) and 1% (long dashes) prevalence. Data markers show country code for the observation. Persistent non-zero exclusive breastfeeding rates in WprB throughout second and third year of childhood, in particular observed rates of about 10% in Papua New Guinea (code = 131, age groups 12–13 to 16–17 months of age), suggest systematic measurement error.
Lauer et al. BMC Medicine 2004 2:26 doi:10.1186/1741-7015-2-26