Table 1: Distribution of HLA-B27 in SpA in Indian population.

Place/population
Disease
PatientsControls O.R
P value
Ref. no.
n+ (%PF)n+ (%PF)

(1) Pune/WIAS29 (72.5)8 (9.09)26.0050.76 [8]
(2) Pune/WIuSpA7 (41.17)8 (9.09)07.0009.50 [8]
(3) Mumbai/WISSA41 (51.89)1 (0.90)117.6066.24 [9]
(4) Mumbai/WISSA63 (41.72)100 (6.17)10.88204.65 [10]
(5) Chennai/SIAS50 (76.92)0 (0.0)811.26125.77 [11]
(6) Chennai/SIReA22 (59.45)0 (0.0)361.4580.43 [11]
(7) Chennai/SIuSpA10 (40.00)0 (0.0)168.6846.97 [11]
(8) Varanasi/NISSA48 (43.63)4 (4.0) 18.8542.06 [12]
(9) Varanasi/NIJSpA50 (71.42)4 (4.0)60.0083.29 [13]
(10) Varanasi/NISSA151 (68.64)4 (4.0)52.52112.43 [14]
(11) Pune/WISSA253 (56.00)7 (3.50)35.23157.61 [15]
(12) Mumbai/WISpA480 (68.57)4 (4.40)46.909135.506.62E  − 32Present study

NI: North India; WI: Western India; SI: South India; n+: number positive, PF: phenotype frequency, O.R: odds ratio, : chi-square with Yates correction.