Study Reasons for exclusion Ferrer-Roca 2004 [55] The cellular phone intervention was used for blood glucose monitoring rather than weight loss Park 2005 [41] All participants had a chronic condition (diabetes) Sung 2005 [46] The intervention was not for weight management Tufano 2005 [48] Review paper Scherr 2006 [44] All participants had a chronic condition (cardiac disease) Joo 2007 [32] No control group Hurling 2007 [31] Some participants had a BMI below 25 at baseline Kim 2008 [34] All participants had a chronic condition (diabetes) Morak 2008 [3] No control group Gerber 2009 [18] Did not include outcome measure related to weight loss Park 2009 [5] All participants had a chronic condition (hypertension) Vespasiani 2009 [49] All participants had a chronic condition (diabetes) Wohlers 2009 [50] No outcome measure related to weight loss (this was a usability study) Heron 2010 [20] Review paper Kaufman 2010 [33] Review paper McCrady-Spitzer 2010 [38] Review paper McGraa 2010 [39] Some participants had a BMI below 25 at baseline Mattila 2010 [21] Review paper Mattila 2010 [21] No control group Prestwich 2010 [42] Some participants had a BMI below 25 at baseline Rossi 2010 [43] All participants had a chronic condition (diabetes) Svensson 2010 [47] Review paper Zheng 2010 [51] Descriptive paper of the intervention Bexelius 2011 [25] Some participants had a BMI below 25 at baseline Boucher 2011 [27] Editorial Daley 2011 [28] No cellular phone intervention used Fukuoka 2011 [29] No control group Hitman 2011 [30] Editorial Lee 2011 [35] Some participants had a BMI below 25 at baseline Maddison 2011 [36] Study protocol Mori 2011 [40] All participants had a chronic condition (diabetes) Seto 2011 [45] All participants had a chronic condition (heart failure) Blasco 2012 [26] All participants had a chronic condition (acute coronary syndrome)

Table 1: Excluded studies and reasons for exclusion (n=33)