Table 2.

Studies (n = 18) cross‐tabulated by the complexity of health‐care problems and of interventions to address them: simple, complicated and complex29

Health‐care problem	Intervention
	Simple (n = 0)	Complicated (n = 2)	Complex (n = 16)
Simple (n = 0)
Complicated (n = 1)		Lachman et al (2015)35
Complex (n = 17)		Boivin et al (2014)39	Armstrong et al (2013)44 Benzo et al (2013)42 Boaz et al (2016)38 de Souza et al (2017)45 Gustavsson (2014)40 Lavoie‐Tremblay et al (2014)46 Locock et al (2014)47 Morrison & Dearden (2013)48 Noergaard et al (2016)41 Olsson et al (2014)33 Pittens et al (2015)36 Rise et al (2014)37 Robben et al (2012)34 Tollyfield (2014)49 Tsianakas et al (2012)50 Worswick et al (2015)43