Table 2.

Joanna Briggs Institute critical appraisal checklist summary table

	Adamsson 2018 [37]	BaHammam 2003 [28]	BaHammam 2005 [29]	BaHammam 2013 [30]	Buchowski 2009 [32]	Cooper 2016 [25]	Friborg 2012 [39]	Garde 2014 [38]	Lehnkering 2007 [35]	Lloyd 2013 [33]	Ludy 2018 [40]	O’Connell 2014 [34]	Pechova 2019 [26]	Shochat 2019 [36]	Suzuki 2019 [41]	Tonetti 2013 [27]	Waterhouse 2009 [31]
Question	Responses
3. Was the exposure measured in a valid and reliable way?	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
4. Were confounding factors identified?	✗	✗	✗	✗	✓	✗	✗	✓	✗	✗	✓	✓	✓	✓	✓	✓	✓
5. Were strategies to deal with confounding factors stated?	✗	✗	✗	✗	✓	✗	✗	✓	✗	✗	✗	✓	✓	✓	✓	✓	U
7. Were the outcomes measured in a valid and reliable way?	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	U	✓	U
8. Was the follow-up time reported and sufficient to be long enough for outcomes to occur?	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✗
9. Was follow up complete, and if not, were the reasons to loss to follow up described and explored?	✗	✗	✓	✓	✓	✗	✗	✗	✓	✗	✗	✓	✓	✗	✗	✓	U
10. Were strategies to address incomplete follow up utilized?	✓	✓	✓	✓	✓	✓	✓	U	✓	✓	✓	✓	✓	✓	✓	✓	U
11. Was appropriate statistical analysis used?	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓

Note – questions 1,2 and 6 omitted as not relevant to included study design

✗ = no, ✓ = yes, U = unclear