Height and body mass index (BMI) of primary ciliary dyskinesia (PCD) patients of the iPCD Cohort compared to national and World Health Organization (WHO) references (constant only models)
| Characteristic | Population | Reference | Subjects | z-score | p-value |
| Height | Overall study | National# | 1601 | −0.27 (−0.33 to −0.21) | <0.001 |
| Overall study | WHO | 1609 | −0.12 (−0.17 to −0.06) | <0.001 | |
| Paediatric (<20 years) | National# | 1226 | −0.26 (−0.33 to −0.20) | <0.001 | |
| Adult (≥20 years) | National# | 439 | −0.31 (−0.42 to −0.20) | <0.001 | |
| Definite PCD¶ | National# | 1054 | −0.26 (−0.33 to −0.19) | <0.001 | |
| Overall study+ | National# | 1601 | −0.30 (−0.36 to −0.24) | <0.001 | |
| BMI | Overall study | National# | 1549 | 0.06 (0.002 to 0.13) | 0.043 |
| Overall study | WHO | 1539 | 0.21 (0.14 to 0.27) | <0.001 | |
| Paediatric (<20 years) | National# | 1184 | 0.02 (−0.05 to 0.09) | 0.582 | |
| Definite PCD¶ | National# | 1019 | 0.05 (−0.02 to 0.13) | 0.172 | |
| Overall study+ | National# | 1549 | 0.03 (−0.04 to 0.09) | 0.424 |
Data is presented as n or mean (95% CI) unless otherwise stated. #: patients from Serbia were excluded from this analysis because no national references were available. ¶: defined as hallmark PCD electron microscopy findings and/or biallelic gene mutation identified based on the ERS PCD Diagnostics Task Force guidelines. +: analysis included one measurement (the earliest available) per patient.