Table 3.
Statistical comparison of autoantibodies by chi‐square test and odds ratio
| Sporadic miscarriage vs control | RPL vs control | RPL vs sporadic miscarriage | ||||
|---|---|---|---|---|---|---|
| Chi‐square P | Odds ratio (95% CI) | Chi‐square P | Odds ratio (95% CI) | Chi‐square P | Odds ratio (95% CI) | |
| aPT IgM | .018 | NA | .010 | NA | .732 | ND |
| aPE IgG | <.001 | NA | .004 | NA | .208 | ND |
| aPE IgM | .001 | 8.8 (2.0‐39.2) | <.001 | 19 (4.4‐81.4) | .012 | 2.2 (1.2‐4.0) |
| aEM IgG | .009 | 9.9 (1.3‐78.0) | .011 | 9.1 (1.2‐78.0) | .834 | ND |
| ANA | .027 | NA | .003 | NA | .105 | ND |
Only the autoimmune antibodies with statistically significant (P < .05) differences among patient groups were listed. NA: no available odds ratio can be calculated due to the presence of a zero value (meaning no positive results for a particular autoimmune antibody). ND: odds ratio was not determined when the corresponding chi‐square P value was >.05.
Abbreviations: aEM, anti‐endometrium; ANA, anti‐nuclear antibodies; aPE, anti‐phosphotidylethanolamine; aPT, anti‐prothrombin; CI, confidence intervals; RPL, recurrent pregnancy loss.