Table 2.

Criterion classification methods used to assess inertial-sensor-based fall risk measures

	Retrospective history	Prospective occurrence	Assessment tools
Auvinet et al., 2003 [39]	1 year	-	-
Bautmans et al., 2011 [40]	6 months	-	TUG >15 s or Tinetti score ≤24
Caby et al., 2011 [41]	1 year	-	25 m walking, Mini Motor test, Tinetti test, TUG, Physical Performance Scale, Fukuda test, One Legged Stance test
Cho and Kamen 1998 [18]	1 year	-	Self-reported frequent fallers
Doheny et al., 2011 [42]	5 years	-	Self-reported fear of falling or presence of cardiovascular risk factors
Doheny et al., 2012 [43]	5 years	-	-
Doi et al., 2013 [44]	-	1 year (reported weekly)	-
Ganea et al., 2011 [45]	-	-	Fried’s criteria for frailty
Giansanti et al., 2006, 2008 [46-48]	Unspecified	-	Tinetti test level 3
Gietzelt et al., 2009 [49]	-	-	STRATIFY score (includes 2 month fall history) ≥2
Greene et al., 2010, 2012 [50,51]	5 years	-	-
Ishigaki et al., 2011 [52]	-	-	One Legged Stance test (eyes open) ≤15 s and/or TUG ≥11 s
Kojima et al., 2008 [53]	1 year	-	-
Laessoe et al., 2007 [54]	-	1 year (fall diary with contact at 6 months)	-
Latt et al., 2009 [55]	1 year	-	-
Liu et al., 2008 [56]	Unspecified	-	Falling during gait perturbation assessment, medical history, self-identification as frequent faller
Liu et al., 2011 [57]	-	-	PPA
Liu et al., 2011 [58]	1 year	-	-
Marschollek et al., 2008 [59]	-	-	TUG > 20 s, STRATIFY score >2, Barthel Index: Mobility score <10
Marschollek et al., 2009 [60]	In-hospital history	-	-
Marschollek et al., 2011 [61,62]	-	1 year	-
Martinez-Ramirez et al., 2011 [63]	-	-	Body mass loss ≥4.5 kg, low energy, low physical activity, weakness, slowness
Menz et al., 2003 [64]	-	-	Overall fall risk score (low, moderate, high risk) based on vision, peripheral sensation, strength, reaction time, balance tests
Moe-Nilssen et al., 2005 [65]	1 year	-	-
Najafi et al., 2002 [17]	-	-	Fall risk score ≥5 based on balance, gait, visual, cognitive and depressive disorders, history of falls.
Narayanan et al., 2008, 2009, 2010 [66-68]	-	-	PPA
O’Sullivan et al., 2009 [1]	1 year	-	-
Paterson et al., 2011 [69]	-	1 year (reported monthly)	-
Redmond et al., 2010 [70]	-	-	PPA
Schwesig et al., 2012 [71]	-	1 year (recorded by caregivers)	-
Senden et al., 2012 [72]	-	-	Tinetti test ≤24 (Low risk 19-24, High risk <19)
Toebes et al., 2012 [73]	1 year	-	-
Weiss et al., 2011 [74]	1 year	-	-
Yack and Berger [75]	1 year	-	Self report of unsteady or unstable walking and/or standing

Assessment tool thresholds indicate a high fall risk category.