Table 5 Full systematic search strategy and search results implemented across five electronic databases

DATABASE

SEARCH TERMS

HITS

PubMed

(((DQI[Title/Abstract] OR “Healthy Eating Index”[Title/Abstract] OR HEI[Title/Abstract] OR YHEI[Title/Abstract] OR “Recommended Food Score”[Title/Abstract] OR RFS[Title/Abstract] OR “variety score”[Title/Abstract] OR “variety index”[Title/Abstract] OR “variety indices”[Title/Abstract] OR “diversity score”[Title/Abstract] OR “diversity index”[Title/Abstract] OR “diversity indices”[Title/Abstract] OR DDI[Title/Abstract] OR ACARFS[Title/Abstract] OR KIDMED[Title/Abstract] OR “DGI CA”[Title/Abstract] OR FVI[Title/Abstract] OR KINDEX[Title/Abstract] OR AMQI[Title/Abstract] OR “diet quality”[Title/Abstract] OR “dietary quality”[Title/Abstract] OR “diet quality”[Title/Abstract] OR “dietary variety”[Title/Abstract])))

AND

((Child*[Title/Abstract] OR child[Mesh] OR infant*[Title/Abstract] OR infant[Mesh] OR toddler*[Title/Abstract] OR adolescent*[Title/Abstract] OR adolescent[Mesh] OR minor*[Title/Abstract] OR minors[Mesh] OR youth*[Title/Abstract] OR teen*[Title/Abstract] OR pre-teen[Title/Abstract] OR kid*[Title/Abstract]))

Search dates: 31 October 2013–10 January 2019

2076

CINAHL

(MH “Child+”) OR (MH “infant+”) OR (MH “adolescent+”) OR (MH “minors+”)

OR

TI Child* OR TI infant* OR TI toddler* OR TI adolescent* OR TI minor* OR TI youth* OR TI teen* OR TI pre-teen OR TI kid*

OR

AB Child* OR AB infant* OR AB toddler* OR AB adolescent* OR AB minor* OR AB pre-teen AB kid*

AND

TI DQI OR TI DQI-I OR TI “Healthy Eating Index” OR TI HEI OR TI YHEI OR TI “Recommended Food Score” OR TI RFS OR TI “variety score” OR TI “variety ind*” OR TI “diversity score” OR TI “diversity ind*” OR TI DDI OR TI ACARFS OR TI KIDMED OR TI “DGI CA” OR TI FVI OR TI KINDEX OR TI AMQI OR TI “diet* quality” OR TI “dietary variety”

OR

AB DQI OR AB DQI-I OR AB “Healthy Eating Index” OR AB HEI OR AB YHEI OR AB “Recommended Food Score” OR AB RFS OR AB “variety score” OR AB “variety ind*” OR AB “diversity score” OR AB “diversity ind*” OR AB DDI OR AB ACARFS OR AB KIDMED OR AB “DGI CA” OR AB FVI OR AB KINDEX OR AB AMQI OR AB “diet* quality” OR AB “dietary variety”

Search dates: 31 October 2013–10 January 2019

814

Embase

‘Child’/exp. OR ‘infant’/exp. OR ‘adolescent’/exp. OR ‘minor (person)’/exp.

AND

(Child*:ab,ti OR infant*:ab,ti OR toddler*:ab,ti OR adolescent*:ab,ti OR minor*:ab,ti OR youth*:ab,ti OR teen*:ab,ti OR pre-teen:ab,ti OR kid*:ab,ti)

AND

(DQI:ab,ti OR DQI-I:ab,ti OR “Healthy Eating Index”:ab,ti OR HEI:ab,ti OR YHEI:ab,ti OR “Recommended Food Score”:ab,ti OR RFS:ab,ti OR “variety score”:ab,ti OR “variety ind*”:ab,ti OR “diversity score”:ab,ti OR “diversity ind*”:ab,ti OR DDI:ab,ti OR ACARFS:ab,ti OR KIDMED:ab,ti OR DGI CA:ab,ti OR FVI:ab,ti OR E-KINDEX:ab,ti OR AMQI:ab,ti OR “diet quality”:ab,ti OR “dietary quality”:ab,ti OR “dietary variety”:ab,ti)

From inception– 11 January 2019

4754

CENTRAL

((Child*:ti,ab OR [mh child] OR infant*:ti,ab OR [mh infant] OR toddler*:ti,ab OR adolescent*:ti,ab OR [mh adolescent] OR minor*:ti,ab OR [mh minors] OR youth*:ti,ab OR teen*:ti,ab OR pre-teen:ti,ab OR kid*:ti,ab))

AND

((DQI:ti,ab OR DQI-I:ti,ab OR “Healthy Eating Index”:ti,ab OR HEI:ti,ab OR YHEI:ti,ab OR “Recommended Food Score”:ti,ab OR RFS:ti,ab OR “variety score”:ti,ab OR “variety ind*”:ti,ab OR “diversity score”:ti,ab OR “diversity ind*”:ti,ab OR DDI:ti,ab OR ACARFS:ti,ab OR KIDMED:ti,ab OR DGI CA:ti,ab OR FVI:ti,ab OR KINDEX:ti,ab OR AMQI:ti,ab OR “diet quality”:ti,ab OR “dietary quality”:ti,ab OR “dietary variety”:ti,ab))

From inception– 11 January 2019

4329

(trials)

Web of Science

(Child* OR child OR infant* OR infant OR toddler* OR adolescent* OR adolescent OR minor* OR minors OR youth* OR teen* OR pre-teen OR kid*)

AND

(DQI OR DQI-I OR “Healthy Eating Index” OR HEI OR YHEI OR “Recommended Food Score” OR RFS OR “variety score” OR “variety ind*” OR “diversity score” OR “diversity ind*” OR DDI OR ACARFS OR KIDMED OR DGI CA OR FVI OR KINDEX OR AMQI OR “diet quality” OR “dietary quality” OR “diet variety”)

From inception– 11 January 2019

3581