Authors Ethnicity Subjects Controls HLA Association
Lio et al.  [8] Sardinia 120 C (79 F + 41 M) 86 (53 F+ 33M) DRB1 *15+  NS
Ma et al.  [9] Shanghai 22 C + 79 N 211 adults A09 +; A30, Cw07,03, 06–P<0.05
Lagaay et al.  [13]Izaaks et al. Dutch 660 F   (>85) 1010 F(20-35years) B40 –ve, DR5 +
Ivanovaet al.  [14] French 533 C; 229 N 2950 adults DR 11–F, DR7-M, DR 13 both (P<0.01)
Izaks et al.  [17] Japan 129 C  (100-110) 129  (20-75) DR1  + NS
Vega  et al. Mexican 71(38 M, 33F) 99 (21-54 years) DRB1*11
Present study Asian Indian 76 (60M, 16F)>65 yrs 75 B*15, C*07,C*15 -
Table 6: Comparison of present study with available literature