Table 2. Unadjusted height metrics derived from SITAR models by exposure to antenatal steroids status.
| Sex | Boys | Girls | ||
|---|---|---|---|---|
| Exposure to antenatal steroids | No | Yes | No | Yes |
| Final measured height (cm) mean (SD) number remaining in study | 178.2 (7.8) n=9 | 172.6 (9.8) n=18 | 162.6 (6.2) n=25 | 164.6 (8.6) n=17 |
| SITAR† derived growth parameters: | n=85 | n=70 | ||
| Height at 18 years (cm) mean (95% CI) | 180.4 (166.1 to 194.7) | 178.5 (161.8 to 195.2) | 164 (154.6 to 173.8) | 165.4 (153.8 to 177.0) |
| Peak height velocity (cm/year) mean (95% CI) | 9.2 (7.2 to 11.2) | 9.2 (7.4 to 11.0) | 7.5 (6.1 to 8.9) | 8.0 (6.2 to 9.8) |
| Age at peak height velocity (years) mean (95% CI) | 13.0 (10.8 to 15.2) | 12.9 (11.1 to 14.7) | 11.2 (9.4 to 13.0) | 10.8 (8.8 to 12.8) |
| SITAR patient-level random effects: | ||||
| 'Size' mean (95% CI) | 0.7 (−8.7 to 10.1) | −1.2 (−14.9 to 12.5) | −0.3 (−10.1 to 9.5) | 0.9 (−10.7 to 12.5) |
| 'Timing' mean (95% CI) | 0.00 (−0.12 to 0.12) | −0.01 (−0.19 to 0.16) | 0.00 (−0.15 to 0.15) | 0.01 (−0.17 to 0.18) |
| 'Intensity' mean (95% CI) | 0.00 (−0.10 to 0.11) | 0.00 (−0.13 to 0.13) | −0.02 (−0.11 to 0.08) | 0.02 (−0.09 to 0.13) |
| SITAR model fit statistics: | ||||
| Root mean squared error (cm) | 1.5 | 1.3 | ||
*
Final height was defined as height when growth velocity <1cm/year or height after 18 years.
†
One SITAR model estimated separately in male and female. Parameters were then summarised for participants within each group dependent upon exposure to antenatal steroids.
SITAR, SuperImposition by Translation and Rotation.