Table 4 Comparison of the previous existing studies analysing the use of probiotics and premature infant neurodevelopment.

From: Effectiveness of a probiotic combination on the neurodevelopment of the very premature infant

Study

Probiotic used

Neurodevelopment assessment

Main results

Jacobs et al.17

Bifidobacterium infantis BB-02 96579 30 × 106, Streptococcus thermophilus TH-4 15957 350 × 106 and Bifidobacterium lactis BB-12 15954 350 × 106 (ABC Dophilus Probiotic Powder for Infants, Solgar USA)

Composite of (at least one) at 2–5 years corrected age:

 Bayley-III < 77.5 or WPPSI-III < 2 standard deviations

 CP with GMFCS 2–5

 Deafness requiring hearing aid or cochlear implant

 Blindness 6/60 better eye

No difference in survival free of neurodevelopment impairment RR 1.01 [0.93–1.09]. Deafness lower in probiotic group (0.6% vs 3.4%)

Sari et al.18

Lactibacillus sporogenes 350 × 106(DMG ITALIA SRL, Rome Italy)

Composite outcome of at last one at 18–22 months corrected age:

 Bayley-II < 70

 PDI < 70

 Deafness needing hearing aids in both ears

 Blindness with no useful vision in either eye

 CP (abnormal one in 1 limb)

There was no significant difference in growth and neurodevelopmental outcomes (p = 0.788) between the two groups

Romeo et al.19

Lactobacillus reuteri ATCC 55730 1 × 108 or Lactobacillus rhamnosus ATCC 53103 6 × 109

Hammersmith score of < 73 (suboptimal) at 12 months corrected age

No statistical differences

were observed in the incidence of suboptimal scores in both probiotic groups (p > 0.05). Statistically significant difference of suboptimal scores (p < 0.05) in the control group vs both probiotic groups

Chou et al.20

Lactobacillus acidophilus 109 and Bifidobacterium infantis 109 (Swiss Serum and Vaccine Institute, Berne, Switzerland)

Composite of (at least one) at 3 years corrected age:

 Bayley-II < 70

 PDI < 70

 Bilateral Blindness

 Hearing impairment > 55 dB in both ears

 CP requiring ambulatory assistance

No significant differences in growth or in any of the neurodevelopmental and sensory outcomes between the 2 groups

Akar et al.21

Lactobacillus reuteri 108 (Biogaia AB, Stockholm, Sweden)

Composite outcome of at last one at 18–24 months corrected age:

 Bayley-II < 70

 PDI < 70

 Deafness needing hearing aids in both ears

 Blindness with no useful vision in either eye

 CP (abnormal tone in 1 limb)

Neurodevelopment impairment did not differ between groups

Probiotic 37/124 vs Non-probiotic 37/125 p = 0.96

  1. WPPSI (Weschler Preschool and Primary Scale of Intelligence), CP (Cerebral Palsy), PDI (Psychomotor development index.