Table 1 Definitions of symptoms and asthma used as outcomes
From: Respiratory and skin health among glass microfiber production workers: a cross-sectional study
Symptoms/conditions | Definition |
|---|---|
Cough | Recurrent or prolonged cough |
Phlegm production | Recurrent or prolonged phlegm production |
Wheezing | Wheezing or whistling of the chest |
Breathlessness | Chest tightness or difficulty breathing |
Nasal symptoms | Dryness, itching or smarting of nose, stuffy nose, runny nose or repeated sneezing (apart from colds) |
Eye symptoms | Dryness of eyes, itchy eyes, irritation or smarting of eyes, watering of eyes, or redness of eyes |
Skin symptoms | Dryness or flaking of skin, itchy skin, irritation, smarting or redness of skin, sore or tender skin, or urticaria |
Current asthma | Asthma diagnosed by a physician in the past 12 months |
Asthma ever | Asthma diagnosed by a physician ever during life time |