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Effect of a hospital policy of not accepting free infant formula on in-hospital formula supplementation rates and breast-feeding duration

  • Marie Tarrant (a1), Kris YW Lok (a1), Daniel YT Fong (a1), Irene LY Lee (a2), Alice Sham (a3), Christine Lam (a4), Kendra M Wu (a5), Dorothy L Bai (a1), Ka Lun Wong (a1), Emmy MY Wong (a6), Noel PT Chan (a1) and Joan E Dodgson (a7)...

Abstract

Objective

To investigate the effect of public hospitals in Hong Kong not accepting free infant formula from manufacturers on in-hospital formula supplementation rates and breast-feeding duration.

Design

Prospective cohort study.

Setting

In-patient postnatal units of four public hospitals in Hong Kong.

Subjects

Two cohorts of breast-feeding mother–infant pairs (n 2560). Cohort 1 (n 1320) was recruited before implementation of the policy to stop accepting free infant formula and cohort 2 (n 1240) was recruited after policy implementation. Participants were followed prospectively for 12 months or until they stopped breast-feeding.

Results

The mean number of formula supplements given to infants in the first 24 h was 2·70 (sd 3·11) in cohort 1 and 1·17 (sd 1·94) in cohort 2 (P<0·001). The proportion of infants who were exclusively breast-fed during the hospital stay increased from 17·7 % in cohort 1 to 41·3 % in cohort 2 (P<0·001) and the risk of breast-feeding cessation was significantly lower in cohort 2 (hazard ratio=0·81; 95 % CI 0·73, 0·90). Participants who non-exclusively breast-fed during the hospital stay had a significantly higher risk of stopping any or exclusive breast-feeding. Higher levels of formula supplementation also increased the risk of breast-feeding cessation in a dose–response pattern.

Conclusions

After implementation of a hospital policy to pay market price for infant formula, rates of in-hospital formula supplementation were reduced and the rates of in-hospital exclusive breast-feeding and breast-feeding duration increased.

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Copyright

Corresponding author

* Corresponding author: Email tarrantm@hku.hk

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