“…7, The reasons for exclusion included (i) not giving SD in eight articles; 40,45,52,54,55,57,59,60 (ii) point estimates were provided by median and/or range in five articles; [42][43][44]49,56 (iii) data shown only in a graphical manner in two articles; 41,53 (iv) only single measurement provided in two articles; 47,51 (v) only proportion of babies with hypothermia presented in one article; 46 (vi) only heart rate variability presented in one article; 48 (vii) heart rate measured but not presented in one article; 50 (viii) outcome reported as stability of cardiorespiratory system in preterm infants (SCRIP) score in one article; 58 (ix) case report format of one baby and skin-to-skin care provided with mechanical ventilation; 7 and (x) case report format of five babies with congenital heart diseases requiring open heart surgery. 61 Among the included 23 studies, 13 studies used case-series (before-after studies), [19][20][21][22][23][24][25][28][29][30]34,35,38 five studies were randomized controlled trials and only data from the arm in which babies had skin-to-skin care were extracted, 11,17,18,32,…”