TABLE 2

Demographics of the study population

PCD patientsControl patientsp-value
Sex male5 (38.5%)7 (58.3%)0.431
Height cm160.9 (143.4–166.4)148.9 (134.1–172.9)0.719
Weight kg40.1 (27.7–66.5)40.1 (27.7–66.5)0.440
BMI kg·m−220.6 (17.6–22.9)18.1 (15.6–20.6)0.217
Age at CT years13.5 (9.75–15.25)13.5 (8–14.75)0.337
Age at PFT years13.5 (9.75–15.25)13.5 (8–14.75)0.312
Time between CT and PFT years0.00 (0.00–0.25)0.00 (0.00–0.00)0.736
FEV1 (z-score)−1.57 (−2.29 to −0.12)−1.65 (−2.17–−0.18)0.979
FVC (z-score)−1.23 (−1.63–0.38)−0.38 (−2.30–0.90)0.719
FEV1/FVC (z-score)−1.32 (−2.31− −0.32)−1.70 (−2.65−−0.86)0.722
FEF25–75% (z-score)−2.05 (−2.9−−0.47)−1.39 (−2.80−−0.99)1.000
FEF75% (%pred)51.67 (36.35–88.97)83.12 (57.17–89.55)0.140

Values, except for sex, are presented as median (interquartile range) and a Mann–Whitney U-test was used to test the differences between primary ciliary dyskinesia (PCD) and control patients. BMI: body mass index; CT: computed tomography; PFT: pulmonary function test; FEV1: forced expiratory flow in 1 s; FVC: forced vital capacity; FEF25–75%: forced expiratory flow during the 25–75% portion of the FVC; FEF75%: forced expiratory flow when 75% of FVC has been exhaled.