Odds ratios (OR) of male versus female cases by Z-score band
| Z-score band | ||||||||
|---|---|---|---|---|---|---|---|---|
| Equivalent centiles: | <−1.88 <3% | −1.88 to <−1.28 3 to <10% | −1.28 to <−0.67 10 to <25% | −0.67 to <0 25 to <50% | 0 to <0.67 50 to <75% | 0.67 to <1.28 75 to <90% | 1.28 to <1.88 90 to <97% | ⩾1.88 ⩾97% |
| *Male:female ratio for live births in each Z-score band set to 51.3%:48.7%—see table 1 footnote. | ||||||||
| †n all cases includes missing values for severity. For more severe and mild case numbers by sex, see tables 1 and 2. | ||||||||
| ‡Bold p < 0.01. This OR for a more severe case with a Z-score <−1.88 being male in comparison to the expected proportion of males among live births is derived as: ((164/107)/(51.3/48.7)) = 1.5. On the next row the comparison is made with the observed proportion of male cases in the reference band as: ((164/107)/(50/51)) = 1.6 (see table 1 for counts of more severe cases by gender). | ||||||||
| All cases | ||||||||
| n males† | 345 | 246 | 338 | 365 | 301 | 136 | 68 | 82 |
| n females | 216 | 173 | 267 | 272 | 198 | 118 | 75 | 58 |
| OR v live births* | 1.5 | 1.3 | 1.2 | 1.3 | 1.4 | 1.1 | 0.9 | 1.3 |
| OR v reference band | 1.4 | 1.2 | 1.1 | 1.2 | 1.3 | 1 | 0.8 | 1.2 |
| More severe cases | ||||||||
| OR v live births* | 1.5‡ | 1.4 | 1.3 | 1.1 | 1.3 | 0.9 | 0.8 | 1.2 |
| OR v reference band | 1.6 | 1.5 | 1.4 | 1.2 | 1.4 | 1 | 0.9 | 1.3 |
| Mild cases | ||||||||
| OR v live births* | 1.6 | 1.4 | 1.2 | 1.4 | 1.6 | 1.2 | 1.0 | 1.3 |
| OR v reference band | 1.3 | 1.1 | 0.9 | 1.1 | 1.3 | 1 | 0.8 | 1.1 |