Table 1. Reported prevalence figures for sIBM and frequency of HLA-DR3 in different populations.

Country	Authors	Prevalence per million	Prevalence per million(>50 yrs)	HLA-DR3 Frequency
Western Australia	Phillips et al. (2000)	4.3	35.3	0.135
Western Australia	Needham et al. (2008)	14.9	51.2	0.135
Netherlands	Badrising et al. (2000)	4.9	16	0.157
USA	Felice (2001)	10.7	28.9 (<45)	0.137
Turkey	Serdaroglu et al. (2008)	1.0	1.0	0.092