Wallace and Milev Ann Gen Psychiatry (2017) 16:18 DOI 10.1186/s12991-017-0141-7

Annals of General Psychiatry Open Access

ERRATUM

Erratum to: The effects of probiotics on depressive symptoms in humans: a systematic review Caroline J. K. Wallace* and Roumen Milev Erratum to: Ann Gen Psychiatry (2017) 16:14 DOI 10.1186/s12991‑017‑0138‑2 This article [1] has been updated to include the correct version of Table 1. The article originally published online

showed an incomplete version of the table. The correct version of Table  1 is shown in this erratum. This error was carried forward by the production team and was not the fault of any authors.

*Correspondence: [email protected] Department of Psychiatry, Queen’s University, 752 King Street West, Kingston, ON K7L 4X3, Canada © The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/ publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Sample characteristics

136 healthy students. Age 18–23 years

55 healthy Caucasians. Mean age 43 years

Sub-population of above L. helveticus and B. longum sample of 25 with lowest UFC levels

35 CFS patients. Age 18–65 years

40 non-smoking healthy young adults. Mean age 20 years

Marcos et al. [37]

Messaoudi et al. [28]

Messaoudi et al. [35]

Rao et al. [31]

Steenbergen et al. [33]

6 weeks

N/A

6 months

Triple-blind, randomized, placebo-controlled, preand post-intervention assessment

4 weeks

Double-blind, randomized, 2 months placebo-controlled pilot study

Double-blind, randomized, 30 days controlled, parallel study

Double-blind, randomized, 30 days controlled, parallel study

Prospective, randomized, controlled, parallel study

Self-report questionnaires on fermented food consumption, neuroticism and social anxiety

Pre- and post-intervention assessment

Double-blind, randomized, 12 weeks placebo-controlled trial

Double-blind, randomized, 3 weeks placebo-controlled trial

Consumption of probiotic supplement improved BDI scores

Key findings and conclusions

LEIDS-r

BDI, BAI

HADS, HSCL-90

HADS, HSCL-90, PSS, CCL

STAI

BFI, SPAI-23

PNQ, EWL

PSS, GDS-SF, DST, SRT, VLT, RVIP, Stroop Task

Consumption of multispecies probiotic significantly reduced overall cognitive reactivity to depression (in particular aggressive and ruminative thoughts)

Consumption of probiotics significantly improved BAI scores. No effect on BDI scores

Consumption of probiotics reduced HADS and HSCL-90 scores

Consumption of probiotics reduced global severity index of the HSCL-90 due to lower somatization, depression, and anger-hostility and also reduced HADS global scores. Consumption of probiotic reduced self-blame score on CCL and increased focus on problem solving. No effect on PSS

No significant effects of probiotics on anxiety levels. Probiotics did modulate lymphocyte and CD56 cell counts

Consumption of fermented foods containing probiotics was negatively associated with symptoms of social anxiety and interacts with neuroticism to predict social anxiety symptoms. Those at higher genetic risk for social anxiety disorder (indexed by high neuroticism) show fewer social anxiety symptoms when they consume more fermented foods

Subjects’ general condition improved by 40.7%. 73% of participants rated the effect of treatment as “good” or “very good”

No significant effects of probiotics on the PSS, GDSSF. Consumption of probiotics did improve DST, SRT, VLT, RVIP, and Stroop Tasks scores

POMS, self-rated mood No effect of probiotic on POMS results. Consumption of probiotic-containing yogurt improved self-reported mood of those whose mood was initially poor

BDI

Duration Measurement of intervention

MDD major depressive disorder, BDI Beck Depression Inventory, POMS profile of mood states scale, PSS perceived stress scale, GDS-SF geriatric depression scale, DST digit span test, SRT story recall test, VLT verbal learning test, RVIP rapid visual information-processing, PNQ psychological-neurologic questionnaire, EWL list of adjectives, BFI big five inventory, SPAI-23 social phobia and anxiety inventory, STAI state-trait anxiety inventory, HADS Hospital Anxiety Depression Scale, HSCL-90 Hopkins symptom checklist, CCL coping checklist, UFC urinary free cortisol, BAI Beck Anxiety Inventory, LEIDS-r Leiden index of depression sensitivity, fMRI functional magnetic resonance imaging

B. lactis and L. acidophilus, brevis, casei, lactis, and salivarius

L. casei

L. helveticus and B. longum

L. casei

Unknown

710 young adults. Mean age 19 years

Hilimire et al. [38]

L. helveticus

L. casei

L. acidophilus and B. bifidum and longum

36 healthy humans. Age 60–75 years

Chung et al. [32]

Study design

Lactobacillus acidophilus, L. Double-blind, randomized, 8 weeks casei, and Bifidobacterium placebo-controlled trial bifidum

Strain

Gruenwal et al. 34 adults suffering from [36] stress or exhaustion. Mean age 44 years

124 healthy humans. Avg. age 62 years

Benton et al. [30]

Akkasheh et al. 40 MDD patients. Age [34] 20–55 years

Reference

Table 1  Characteristics of included studies

Wallace and Milev Ann Gen Psychiatry (2017) 16:18 Page 2 of 3

Wallace and Milev Ann Gen Psychiatry (2017) 16:18

The online version of the original article can be found under doi:10.1186/s12991-017-0138-2.

Received: 24 February 2017 Accepted: 27 February 2017

Page 3 of 3

Reference 1. Wallace CJK, Milev Roumen. The effects of probiotics on depressive symptoms in humans: a systematic review. Ann Gen Psychiatry. 2017;16:14. doi:10.1186/s12991-017-0138-2.

Erratum to: The effects of probiotics on depressive symptoms in humans: a systematic review.

[This corrects the article DOI: 10.1186/s12991-017-0138-2.]...
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