Formula versus donor breast milk for feeding preterm or low birth weight infants - PubMed (original) (raw)

Review

Formula versus donor breast milk for feeding preterm or low birth weight infants

Maria Quigley et al. Cochrane Database Syst Rev. 2018.

Update in

Abstract

Background: When sufficient maternal breast milk is not available, alternative forms of enteral nutrition for preterm or low birth weight (LBW) infants are donor breast milk or artificial formula. Donor breast milk may retain some of the non-nutritive benefits of maternal breast milk for preterm or LBW infants. However, feeding with artificial formula may ensure more consistent delivery of greater amounts of nutrients. Uncertainty exists about the balance of risks and benefits of feeding formula versus donor breast milk for preterm or LBW infants.

Objectives: To determine the effect of feeding with formula compared with donor breast milk on growth and development in preterm or low birth weight (LBW) infants.

Search methods: We used the Cochrane Neonatal search strategy, including electronic searches of the Cochrane Central Register of Controlled Trials (CENTRAL; 2017, Issue 6), Ovid MEDLINE, Embase, and the Cumulative Index to Nursing and Allied Health Literature (until 8 June 2017), as well as conference proceedings and previous reviews.

Selection criteria: Randomised or quasi-randomised controlled trials (RCTs) comparing feeding with formula versus donor breast milk in preterm or LBW infants.

Data collection and analysis: Two review authors assessed trial eligibility and risk of bias and extracted data independently. We analysed treatment effects as described in the individual trials and reported risk ratios (RRs) and risk differences (RDs) for dichotomous data, and mean differences (MDs) for continuous data, with respective 95% confidence intervals (CIs). We used a fixed-effect model in meta-analyses and explored potential causes of heterogeneity in subgroup analyses. We assessed the quality of evidence for the main comparison at the outcome level using "Grading of Recommendations Assessment, Development and Evaluation" (GRADE) methods.

Main results: Eleven trials, in which 1809 infants participated in total, fulfilled the inclusion criteria. Four trials compared standard term formula versus donor breast milk and seven compared nutrient-enriched preterm formula versus donor breast milk. Only the four most recent trials used nutrient-fortified donor breast milk. The trials contain various weaknesses in methodological quality, specifically concerns about allocation concealment in four trials and lack of blinding in most of the trials.Formula-fed infants had higher in-hospital rates of weight gain (mean difference (MD) 2.51, 95% confidence interval (CI) 1.93 to 3.08 g/kg/day), linear growth (MD 1.21, 95% CI 0.77 to 1.65 mm/week) and head growth (MD 0.85, 95% CI 0.47 to 1.23 mm/week). We did not find evidence of an effect on long-term growth or neurodevelopment. Formula feeding increased the risk of necrotising enterocolitis (typical risk ratio (RR) 1.87, 95% CI 1.23 to 2.85; risk difference (RD) 0.03, 95% CI 0.01 to 0.06).The GRADE quality of evidence was moderate for rates of weight gain, linear growth, and head growth (downgraded for high levels of heterogeneity) and was moderate for neurodevelopmental disability, all-cause mortality, and necrotising enterocolitis (downgraded for imprecision).

Authors' conclusions: In preterm and LBW infants, feeding with formula compared with donor breast milk, either as a supplement to maternal expressed breast milk or as a sole diet, results in higher rates of weight gain, linear growth, and head growth and a higher risk of developing necrotising enterocolitis. The trial data do not show an effect on all-cause mortality, or on long-term growth or neurodevelopment.

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Conflict of interest statement

MQ: nothing to declare. NDE has conducted research with support from manufacturers of infant formula including Nestec SA (Switzerland), Wyeth UK and Nutricia UK but did not receive any payment, support or benefit in kind for contribution to this review. WM: nothing to declare.

Figures

Figure 1

Figure 1

Study flow diagram: 2018 review update.

Figure 2

Figure 2

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.

Figure 3

Figure 3

Forest plot of comparison: 1 Formula (term or preterm) versus donor breast milk, outcome: 1.2 Weight gain (g/kg/day).

Figure 4

Figure 4

Forest plot of comparison: 1 Formula (term or preterm) versus DBM (unfortified of fortified), outcome: 1.3 Linear growth (crown‐heel length mm/week).

Figure 5

Figure 5

Forest plot of comparison: 1 Formula (term or preterm) versus DBM (unfortified of fortified), outcome: 1.6 Head growth (mm/week).

Figure 6

Figure 6

Forest plot of comparison: 1 Formula (term or preterm) versus DBM (unfortified of fortified), outcome: 1.24 All‐cause mortality.

Figure 7

Figure 7

Forest plot of comparison: 1 Formula (term or preterm) versus DBM (unfortified of fortified), outcome: 1.25 Necrotising enterocolitis.

Analysis 1.1

Analysis 1.1

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 1 Time to regain birth weight (days from birth).

Analysis 1.2

Analysis 1.2

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 2 Weight gain (g/kg/day).

Analysis 1.3

Analysis 1.3

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 3 Linear growth (crown‐heel length mm/week).

Analysis 1.4

Analysis 1.4

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 4 Linear growth (crown‐rump length mm/week).

Analysis 1.5

Analysis 1.5

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 5 Linear growth (femoral length mm/week).

Analysis 1.6

Analysis 1.6

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 6 Head growth (mm/week).

Analysis 1.7

Analysis 1.7

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 7 Weight (kg) at 9 months post‐term.

Analysis 1.8

Analysis 1.8

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 8 Length (cm) at 9 months post‐term.

Analysis 1.9

Analysis 1.9

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 9 Head circumference (cm) at 9 months post‐term.

Analysis 1.10

Analysis 1.10

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 10 Weight (kg) at 18 months post‐term.

Analysis 1.11

Analysis 1.11

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 11 Length (cm) at 18 months post‐term.

Analysis 1.12

Analysis 1.12

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 12 Head circumference (cm) at 18 months post‐term.

Analysis 1.13

Analysis 1.13

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 13 Weight (kg) at 7.5 to 8 years of age.

Analysis 1.14

Analysis 1.14

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 14 Length (cm) at 7.5 to 8 years of age.

Analysis 1.15

Analysis 1.15

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 15 Head circumference (cm) at 7.5 to 8 years of age.

Analysis 1.16

Analysis 1.16

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 16 Bayley Mental Development Index at 18 months.

Analysis 1.17

Analysis 1.17

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 17 Bayley Psychomotor Development Index at 18 months.

Analysis 1.18

Analysis 1.18

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 18 Neurodevelopmental disability at 18 months.

Analysis 1.19

Analysis 1.19

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 19 Bayley‐III.

Analysis 1.20

Analysis 1.20

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 20 Bayley‐III score <70.

Analysis 1.21

Analysis 1.21

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 21 Cerebral palsy.

Analysis 1.22

Analysis 1.22

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 22 Hearing impairment.

Analysis 1.23

Analysis 1.23

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 23 Visual impairment.

Analysis 1.24

Analysis 1.24

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 24 All‐cause mortality.

Analysis 1.25

Analysis 1.25

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 25 Necrotising enterocolitis.

Analysis 1.26

Analysis 1.26

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 26 Days after birth to establish full enteral feeding.

Analysis 1.27

Analysis 1.27

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 27 Feeding intolerance or diarrhoea.

Analysis 1.28

Analysis 1.28

Comparison 1 Formula (term or preterm) versus donated breast milk (DBM) (unfortified or fortified), Outcome 28 Incidence of invasive infection.

Analysis 2.1

Analysis 2.1

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 1 Weight gain (g/kg/day).

Analysis 2.2

Analysis 2.2

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 2 Linear grwoth (crown‐heel length mm/week).

Analysis 2.3

Analysis 2.3

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 3 Head growth (mm/week).

Analysis 2.4

Analysis 2.4

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 4 Weight (kg) at 9 months post‐term.

Analysis 2.5

Analysis 2.5

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 5 Length (cm) at 9 months post‐term.

Analysis 2.6

Analysis 2.6

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 6 Head circumference (cm) at 9 months post‐term.

Analysis 2.7

Analysis 2.7

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 7 Weight (kg) at 18 months post‐term.

Analysis 2.8

Analysis 2.8

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 8 Length (cm) at 18 months post‐term.

Analysis 2.9

Analysis 2.9

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 9 Head circumference (cm) at 18 months post‐term.

Analysis 2.10

Analysis 2.10

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 10 Weight (kg) at 7.5 to 8 years of age.

Analysis 2.11

Analysis 2.11

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 11 Length (cm) at 7.5 to 8 years of age.

Analysis 2.12

Analysis 2.12

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 12 Head circumference (cm) at 7.5 to 8 years of age.

Analysis 2.13

Analysis 2.13

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 13 Bayley Mental Development Index at 18 months.

Analysis 2.14

Analysis 2.14

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 14 Bayley Psychomotor Development Index at 18 months.

Analysis 2.15

Analysis 2.15

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 15 Neurodevelopmental disability at 18 months.

Analysis 2.16

Analysis 2.16

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 16 All‐cause mortality.

Analysis 2.17

Analysis 2.17

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 17 Necrotising enterocolitis.

Analysis 2.18

Analysis 2.18

Comparison 2 Subgroup analysis: formula versus donated breast milk (DBM) given as (i) sole diet or (ii) a supplement to maternal expressed breast milk, Outcome 18 Incidence of invasive infection.

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References

References to studies included in this review

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