1. Volume 131, Issue 5, Pages 1345-1352 (May 2007)
Diagnostic Classification of Persistent Rhinitis and Its Relationship to Exhaled Nitric Oxide and Asthma 
Rolla Giovanni , MD, FCCP, Guida Giuseppe , MD, Heffler Enrico , MD, Badiu Iuliana , MD, Bommarito Luisa , MD, De Stefani Antonella , MD, Usai Antonio , MD, Cosseddu Domenico , MD, Nebiolo Franco , MD, Bucca Caterina , MD 
CHEST 
Volume 131, Issue 5, Pages (May 2007)
DOI: /chest
Copyright © 2007 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Clinical classification of patients depending on rhinitic symptoms. aIndicates when allergen sensitization and exposure are related to symptoms. bIndicates evaluated also by nasal cytology in order to identify patients affected by NARES.
CHEST  , DOI: ( /chest )
Copyright © 2007 The American College of Chest Physicians Terms and Conditions

3. Figure 2
Clinical classification of patients depending on airway involvement. aWhen PD20 was < 800 μg or FEV1 after bronchodilation testing with salbutamol was > 12% compared to the basal FEV1 value. bEosinophilic bronchitis if eosinophils > 3% of differential cell count.
CHEST  , DOI: ( /chest )
Copyright © 2007 The American College of Chest Physicians Terms and Conditions

4. Figure 3
Mean (95% CI) Feno values in patients with NAR, AR, and CRS depending on respiratory symptoms and diagnosis of asthma. *p = 0.015, comparing AR with asthma to AR with respiratory symptoms without asthma. †p < 0.05, comparing AR with asthma and AR with respiratory symptoms without asthma to AR with rhinitis only. ‡p < 0.01, comparing CRS with asthma and CRS with respiratory symptoms without asthma to CRS with rhinitis only. There were no significant differences in Feno values in all subgroups of NAR patients. Mean Feno values of AR, CRS (both p < 0.001), and NAR (p = 0.002) are significantly higher than healthy subjects (HS).
CHEST  , DOI: ( /chest )
Copyright © 2007 The American College of Chest Physicians Terms and Conditions