Frequency (%) of HLA DRB1* alleles in PCR positive and negative patients5-151
| DRB1*allele | PCR negative (n=52) | PCR positive (n=69) | Statistical analysis χ2 |
| DRB1*01 | 15 (28.8) | 6 (8.7) | p=0.004 (pc=0.036)* |
| DRB1*0103 | 3 (5.8) | 3 (4.3) | NS |
| DRB1*03 | 16 (30.8) | 27 (39.1) | NS |
| DRB1*04 | 15 (28.8) | 22 (31.9) | NS |
| DRB1*07 | 13 (25) | 19 (27.7) | NS |
| DRB1*08 | 1 (1.9) | 1 (1.4) | NS |
| DRB1*09 | 1 (1.9) | 0 | NS |
| DRB1*10 | 1 (1.9) | 0 | NS |
| DRB1*11 | 5 (9.6) | 5 (7.2) | NS |
| DRB1*12 | 1 (1.9) | 0 | NS |
| DRB1*13 | 3 (5.8) | 14 (20.3) | p=0.02 (pc=NS) |
| DRB1*14 | 1 (1.9) | 3 (4.3) | NS |
| DRB1*15 | 21 (40.4) | 24 (34.8) | NS |
| DRB1*16 | 0 | 0 | NS |
↵5-151 The frequencies of HLA DRB1* alleles were compared among PCR positive and negative women. To minimise the possibility that the observed probability (p) values might be because of chance, corrections (pc) were made for the number of alleles tested (only alleles present at >3% were stastically analysed; (n=9)).
PCR, polmerase chain reaction.