Table 2.

Characteristics of disease in full sample (N = 511)

	Category	Percentage (%)	N
Age	Total	–	511
	18–24	26.2	134
	25–34	21.9	112
	35–44	14.7	75
	45–54	22.1	113
	55–99	15.1	77
Sex	Male	46.0	235
	Female	54.0	276
Smoking status	Yes	52.4	268
	No	47.6	243
Severity	Mild/persistent	1.2	6
	Moderate-severe/persistent	61.3	313
	Mild/intermittent	1.6	8
	Moderate-severe/intermittent	36.0	184
	Denmark	17.4	89
	France	28.4	145
	Germany	35.0	179
	Sweden	19.2	98