Table 1 : Intra-observer agreement of observational ratings of SLS.

Observer	Percentage of agreement			Kappa Value (95% CL)
	Male (M)	Female (F)	Total (M&F)	Male (M)	Female (F)	Total (M&F)
Observer1	95.0%	95.0%	95.0%	0.89(0.70-1.00)	0.90(0.72-1.00)	0.89(0.71-1.00)
Observer2	90.0%	100%	95.0%	0.80(0.44-1.00)	0.90(1.00-1.00)	0.90(0.72-1.00)
Observer3	100%	100%	100%	1.00(1.00-1.00)	1.00(1.00-1.00)	1.00(1.00-1.00)
Observer4	95.0%	95.0%	99.0%	0.90(0.72-1.00)	0.90(0.72-1.00)	0.90(0.72- 1.00)

*Reliability exceeds value considered necessary for clinical use [37].