Table 1 Overview of data variables and collection schedule in Korean childhood Asthma Study (KAS)

Questionnaire

regarding asthma

V

V

V

V

V

Questionnaire regarding environment

V

V

V

V

V

ACT/C-ACT

V

V

V

V

V

Individual case record

V

V

V

V

V

WBC, CRP, Eosinophil count, Total IgE

V

V

V

Skin prick tests

V

V

V

FEV₁, FVC, MMEF

(pre- and post-BD)

V

V

V

Methacholine PC₂₀ or Mannitol PD₁₅

V

V

V

FeNO

V

V

V

Blood sample 15 cc

for biomarker study

V

V

V

Mobile App

for the subgroup

App installation and usage instruction