Table 2—

Prevalence of clinical conditions and complications associated with differences in forced expiratory volume in one second (FEV1) % pred

Clinical conditions and complicationsAgeOverall
6–12 yrs13–17yrs≥18 yrs
Subjects n2602165527537010
>10% lower FEV1 % pred
 Congestive heart failure6 (0.2)*7 (0.4)*23 (0.8)23 (0.3)
 Haemoptysis99 (3.8)187 (11.3)631 (22.9)917 (13.1)
 Indicators of malnutrition149 (5.7)140 (8.5)164 (6.0)453 (6.5)
 Pneumothorax7 (0.3)*23 (1.4)83 (3.0)106 (1.5)
5–10% lower FEV1 % pred
 ABPA173 (6.7)131 (7.9)215 (7.8)519 (7.4)
 Asthma-like symptoms545 (20.9)373 (22.5)672 (24.4)1590 (22.7)
 Diabetes melliuts12 (0.5)42 (2.5)161 (5.8)215 (3.1)
 Gastro-oesophageal reflux96 (3.7)77 (4.7)181 (6.6)354 (5.0)
5–10% higher FEV1 % pred
 Nasal polyposis366 (14.1)264 (15.9)375 (13.6)1005 (14.3)
  • Data are presented as n (%)

  • ABPA: allergic bronchopulmonary aspergillosis

  • *: Patient prevalence <10 is not included in the analysis of FEV1