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Table 1 Characteristics of identified studies

From: Indirect costs associated with ulcerative colitis: a systematic literature review of real-world data

Author, yearCountryStudy populationCharacteristics of study populationFollow up duration
Kawalec et al. 2017 [14]PolandPatients with UCN = 202
Disease duration 26.35 years
October 2015- Q1 2016
Van Der Valk et al. 2016 [15]The NetherlandsIBD patientsN = 566
Disease duration 16 years
2 years
Malinowski et al. 2016 [16]PolandUC patientsN = 6900NR
Aldeguer et al. 2016 [17]SpainPatients with UCN = 28512 months
Cohen et al. 2015 [18]USAUC patientsN = 17282 years (1 year baseline period and 1 year study period)
Van Der Valk et al. 2014 [19]The NetherlandsIBD PatientsN = 937
Disease duration 13.3 years
3 months
Meek et al. 2013 [20]USAPatients with UCN = 31,05012 months
Cohen et al. 2012 [21]USAUC patientsN = 17542 years
Kostic et al. 2015 [22]SerbiaPatients with UCN = 53NR
Van Der Valk et al. 2012 [23]The NetherlandsPatients with IBDN = 9282 years
Cannon et al. 2011 [24]NRIBD patientsN = 72NR
Gibson et al. 2008 [25]USAPatients with CD and UCN = 8970NR
Mandel M et al. 2014 [1]HungaryIBD patientsN = 183
Disease duration 9.9 years
NR
Katz Avitan et al. 2016 [2]IsraelUC patientsN = 150NR
Hellström et al. 2017 [26]SwedenUC patientsN = 13612 years
Neovius et al. 2010 [27]SwedenUC patientsN = 2914NR
Stark et al. 2006 [28]GermanyUC patientsN = 483
Disease duration 12 years
NR
Van Der Valk et al. 2015 [29]The NetherlandsIDB patientsPouch: n = 81
Mean age 46.7
Disease duration 15 years
For 2 years at 3 months intervals
Ileostomy: n = 48
Disease duration 18 years
Anti-TNFα: n = 34
Disease duration 16 years