Validation of digit-length ratio (2D:4D) assessments on the basis of DXA-derived hand scans

BMC Medical Imaging

Table 1 Intrarater reliability of 2D:4D measurements

Observer	Method	mean 2D:4D (SD)	∆	TEM (%)	SEE	ICC (95% CI)	Classification
Observer 1	RX	0.905 (0.020)	0.001	0.004 (0.6%)	0.005	0.97 (0.94-0.98)	excellent
	DXA	0.908 (0.019)	0.001	0.006 (0.8%)	0.009	0.90 (0.85-0.93)	excellent
Observer 2	RX	0.904 (0.020)	0.001	0.006 (0.8%)	0.010	0.91 (0.85-0.95)	excellent
	DXA	0.907 (0.020)	0.001	0.007 (0.9%)	0.009	0.91 (0.85-0.94)	excellent

Note: Intrarater reliability (repeatability) for both raters. = difference; TEM = technical error of measurement, absolut and in % of the mean. SEE = standard error of estimate; ICC = intraclass correlation coefficients; CI = confidence intervall; classification according to Rosner (2011). ICCs < 0.7 were considered non-acceptable, 0.71 < ICCs < 0.79 were acceptable, 0.80 < ICCs < 0.89 were very good and ICCs >0.90 were excellent.

ISSN: 1471-2342