“…A total of 19 studies were included in this meta-analysis, examining PoRCs following AT surgery in 120,544 patients, with 59,323 of them involving OSA. Thirteen of the included studies were retrospective observational (Allareddy et al, 14 Camacho et al, 15 Castano et al, 16 Dalesio et al, 17 Ekstein et al, 18 Kang et al, 19 Kieran et al, 20 Lalakea et al, 21 Marsollier et al, 22 Patel et al, 23 Rodriguez-Catalán et al, 24 Tweedie et al, 25 and Ali et al), 26 two retrospective case-control (Gehrke et al 27 and Riaz et al), 28 one ambidirectional (Muninnobpamasa et al), 29 one prospective (Sanders et al) 30 and two cross-sectional (Kou et al 31 and Martins et al). 32 The number of patients examined in the various studies included were as follows: four of the studies 23,28,30,32 had fewer than 100 patients participating, another four 16,18,21,22 consisted of 100-200, five studies 15,17,24,26,29 comprised 200-500, two 19,20 involved 500-1000, and four 14,25,27,31 had over 1000.…”