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. 2023 Oct 9;2023(10):CD015144. doi: 10.1002/14651858.CD015144

4. Overview of included studies and quality ratings (original review and this update).

  Guidelines Systematic reviews Primary studies
Original review (Ryan 2021a) 3 11 17
Cochrane update 17 20* 0
Total included 20
Quality (AGREE II):

  • 1 high

  • 6 moderate

  • 13 low

 31*
Quality (AMSTAR):

  • 4 high

  • 14 moderate

  • 12 low

 17
Quality (design‐specific tools):

  • 9 moderate

  • 8 low

* One included review was empty (Moya‐Salazar 2021) and was therefore not assessed for quality or considered further in this update.

AMSTAR ratings categorised as follows (scored out of 11): 1‐4 low, 5‐7 moderate, 8+ high‐quality

AGREE II ratings categorised as follows (mean scores across 6 domains): < 40% low, 40 to < 70% moderate, 70%+ high‐quality