Lower breastfeeding rates among supplemental nutrition program for women, infants, and children participants: a call for action.

摘要

Ryan and his colleagues have contributed substantially to our knowledge and information about infant feeding trends for the past 50 years. The Ross Laboratories Mother's Survey has remained consistent in content while increasing the frequency of polling from every quarter to every month and increasing the sample size from 40 000 to 117 000 households per month. Sampling is adjusted to oversample low-responding groups. Mothers report on the current month's feeding practices and do not depend on long-term recall. Granted, the response rate is low, but results are consistent and the respondent population is representative of the general population. Results can be compared year by year and decade by decade.