Table 3.
Differences in FEV1 and FVC z-scores (GLI-White) by ethnicity relative to White subjects, partially and fully adjusted for sex, age and anthropometry (N = 2751)*.
| Adjusted for | |||
|---|---|---|---|
| sex, age, Ht | sex, age, Ht, SHt | sex, age, Ht, SHt, ChW | |
| z-FEV1 | |||
| Black | −1.32 (−1.4; −1.2) | −1.17 (−1.3; −1.1) | −1.18 (−1.3; −1.1) |
| South Asian | −0.89 (−1.0; −0.8) | −0.77 (−0.9; −0.7) | −0.76 (−0.9; −0.7) |
| Other/ mixed | −0.51 (−0.6; −0.4) | −0.46 (−0.6; −0.3) | −0.47 (−0.6; −0.3) |
| BIC; df | 6277; 9 | 6218; 10 | 6183; 11 |
| z-FVC | |||
| Black | −1.27 (−1.4; −1.2) | −1.09 (−1.2; −1) | −1.11 (−1.2; −1) |
| South Asian | −0.95 (−1.0; −0.9) | −0.80 (−0.9; −0.7) | −0.80 (−0.9; −0.7) |
| Other/ mixed | −0.47 (−0.6; −0.3) | −0.42 (−0.5; −0.3) | −0.43 (−0.5; −0.3) |
| BIC; df | 6188; 9 | 6101; 10 | 5993; 11 |
Data presented as β-coefficient (95% Confidence Interval), derived from modelling;
*
Analyses based on data from 2751 occasions with full anthropometric data. Abbreviations: Ht: height, SHt: sitting height, ChW: chest width, BIC: Bayesian information criterion, df: degrees of freedom. After further adjusting for sitting height, ethnic differences in zFEV1 and zFVC were further reduced by 11% and 14% respectively in Black-African origin children, by 13% and 16% respectively in South-Asian children and by 10% and 11% respectively in “Other/Mixed” ethnicity children.