A protocol for classifying normal- and flat-arched foot posture for research studies using clinical and radiographic measurements

Table 2 Relative and absolute reliability of measuring the talus-second metatarsal angle (T2MA)

	RELATIVE RELIABILITY	ABSOLUTE RELIABILITY
	Type (3,1) ICC (95% CI)	Systematic bias (% mean difference)	Random error (95% LoA)
*Within-rater*
left feet (n = 51)	0.91 (0.85 – 0.95)*	- 0.5°	7.1°
right feet (n = 51)	0.71 (0.55 – 0.83)*	- 0.3°	12.2°
*Between-rater*
left feet (n = 41)	0.78 (0.62 – 0.88)*	- 1.0°	5.6°
right feet (n = 41)	0.68 (0.47 – 0.82)*	1.5°	7.1°

ISSN: 1757-1146