Table 1.

Study population

Number of participants	641
Gender
Men	40.3% (n = 258)
Women	59.7% (n = 383)
Missing information on gender	> 0.1%(n = 10)
Age
Mean	50.5 years
Standard deviation	15.1 years
Range	18–86 years
18–29 years	11.4% (n = 73)
30–44 years	17.3% (n = 111)
45–64 years	53.7% (n = 344)
> 64 years	17.6% (n = 113)
Missing information on age	> 0.1% (n = 3)
Professiona
Indoor workers (office etc.)	60.4% (n = 387)
House wives / house husbands	12.9% (n = 83)
Construction workers	6.6% (n = 42)
Students and scholars	2.2% (n = 14)
Farmers	2% (n = 13)
No employment	1.7% (n = 11)
Hunters	1.1% (n = 7)
Others	5.3%(n = 34)
Missing information on profession	10.9% (n = 70)
Retirement
Pensioners	24% (n = 154)
Missing information on retirement	> 0.1% (n = 22)

^a18 participants indicated having two professions, 1 reported having three professions