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. 2015 Aug 12;15:60. doi: 10.1186/s12874-015-0045-7

Table 1.

Characteristics of the articles included in the systematic review (k = 212)

Characteristics Median [IQR] Range (min - max)
Year of publication (year) 2010 [2007–2013] 1997 - 2014
Sample size (N)a 129 [56–359] 1 - 9105
Sample mean age (year)a 58 [52–64] 11 - 77
Sample mean percentage of female (%) 61 [41–100] 0 - 100
Number of articles (k) Percentage (%)
Country where participants came from
Canada 110 51.9
USA 65 30.7
Australia 11 5.2
UK 9 4.2
Other countriesb,c 17 8.0
Cancer site
Breast 61 28.8
Prostate 19 9.0
Colorectal 16 7.5
Lung 12 5.7
Hematological (leukemia, myeloma) 10 4.7
Hodgkin/non-Hodgkin lymphoma 8 3.8
Endometrial 7 3.3
Brain/glioma 7 3.3
Head/neck/oral cavity 5 2.4
Ovarian 5 2.4
Kidney 5 2.4
Bladder 3 1.4
Survivors from different types of cancer 54 25.5

The unit of observation is the published article. IQR: 25th-75th interquartile range. k: number of published articles included in the systematic review. a k = 211 due to missing information in one article; for all the other variables, k = 212. bOne study included participants from Canada and USA (k = 1; 0.5 %) and one study included participants from Australia and New Zealand (k = 1; 0.5 %). cOther countries included New Zealand (k = 4; 1.9 %), Ireland (k = 3; 1.4 %), Norway (k = 3; 1.4 %), Taiwan (k = 3; 1.4 %), Spain (k = 2; 0.9 %) and Italy (k = 1; 0.5 %).