“…Overall, the follow-up periods of the RCTs ranged from 13 to 30 months. In terms of observational studies, 11 prospective (including the Dillon et al RCT) [5,[12][13][14][15][16][17][18][19][20][21] and 15 retrospective studies [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] evaluated the use of venous catheters in different patient populations. 11 studies were in the adult population [14,[23][24][25][26][28][29][30][31][32][33][34], of which 4 recruited only gynaecological patients [25,26,30,34], 13 were performed in children (age B21 years) [7, 12, 13, 15-22, 35, 36], and 1 was performed in a mixed population (age 3-78 years); for the purpose of analysis, this study population was defined as adult [27].…”