“…The majority of studies (27/31) utilised two or more pain outcomes. The most commonly used outcome measures were numerical grading of pain/numerical reporting scale (NRS) out of 10 (16 studies) [ 12 , 17 , 20 – 24 , 27 – 29 , 32 – 35 , 38 , 40 ], opioid consumption (16 studies), and visual analogue scale 10 cm (VAS; 12 studies) [ 13 – 16 , 25 , 26 , 31 , 36 , 37 , 39 , 41 , 42 ]. Other than reporting total opioid consumption, analgesia usage was also measured with the following outcomes: nonopioid analgesic requirement [ 14 , 16 , 32 , 33 , 36 ], total supplementary analgesic requirement [ 34 , 35 ], and cumulative opioid consumption [ 26 , 37 ].…”