Table 1.

Summary of participant characteristics. Values are presented as the mean ± SD or number of cases (percentage) *p < 0.05.

Characteristics	Patients (n = 29) Mean ± SD	Controls (n = 30) Mean ± SD	p-value
Age (years)	64 ± 10	58 ± 17	0.295
Number of medications*	1.4 ± 1.4	0.5 ± 0.6	0.007

	n (%)	n (%)
Sex			0.887
Female	13 (45%)	14 (47%)
Male	16 (55%)	16 (53%)
Ethnicity			0.492
European	29 (100%)	28 (94%)
Other		2 (6%)
Education level			0.173
Basic	1 (3%)	1 (3%)
Secondary	7 (24%)	2 (7%)
Higher	21 (72%)	27 (90%)
Occupation*			0.009
Working	10 (35%)	19 (63%)
Sick-leave	7 (24%)	1 (3%)
Student		3 (10%)
Retired	12 (41%)	7 (23%)
Smoking status			0.052
Current smoker	6 (21%)	2 (7%)
Non-smoker	23 (79%)	28 (93%)