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Table 2 General description of included studies in terms of publication year, data collection year, and study wideness

From: New insight into the informal patients’ payments on the evidence of literature: a systematic review study

Classification categorySub-categoriesNAppendix-Index of publication
Publication year1990–19950
1996–2000221, 58
2001–200552,6, 12, 52, 57
2006–2010101, 20, 23, 30, 32, 38, 51, 54, 61, 62
2011–2017453,4,5,7,8, 9, 10, 11, 13,14, 15, 16, 17, 18,19, 22, 24, 25, 26, 27, 28, 29, 31, 33, 34, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 53, 55, 56, 59, 60
Data Collection year1990–1995158
1996–200022, 57
2001–200581,20, 23, 32, 39, 51, 52, 54
2006–2010203,4, 11, 14, 15, 16, 18, 19, 24, 26, 28, 29, 34, 35, 36, 43, 44, 46, 50, 62
2011–2017195, 7, 9, 10, 13, 22, 25, 27, 33, 37, 40, 45, 47, 48, 49, 55, 56, 59, 60
Not clear126, 8, 12, 17, 21, 30, 31, 38, 41,42, 53,61
Study WidenessSingle-country451, 2,4, 5,6, 7,8,10, 11, 12, 14, 15, 17, 18, 19, 20, 22, 23, 24, 25, 26, 28, 29, 30, 32, 33, 35, 39, 40, 41, 42, 43,44, 46, 47, 49, 51, 52, 53, 54, 55, 56, 58, 59, 60
Cross-countries173,9, 13, 16, 21, 27, 31, 34, 36, 37, 38, 45, 48, 50, 57, 61, 62