Table 1 Socio-demographic data regarding trial participants at study entry

Age, y [mean (SD)]

75.96 (6.54)

76.48 (6.16)

0.95

Male/Female [No of participants (%)]

164/66

76/28

0.88

BMI, kg/m² [mean (SD)]

26.55 (4.96)

26.24 (4.91)

0.59

Smoking habit (No of participants)

0.55

 • Current Smoker

10 (4.35%)

3 (2.88%)

 • Former Smoker

153 (66.52%)

64 (61.54%)

 • Non-Smoker

65 (28.26%)

36 (34.62%)

 • Packs/year [mean (SD)]

42.35 (63.03)

50.54 (90.50)

0.60

Education level [No of participants (%)]

0.89

 • No formal schooling/Less than primary school

20 (9.66%)

10 (10.20%)

 • Primary school

109 (52.66%)

53 (54.08%)

 • Secondary school

39 (18.84%)

16 (16.33%)

 • High school

28 (13.53%)

12 (12.24%)

 • College/University

10 (4.83%)

7 (7.14%)

 • Post graduate degree

1 (0.48%)

0 (0.00%)

Marital status [No of participants (%)]

0.83

 • Never married

6 (2.90%)

3 (3.06%)

 • Currently married

139 (67.15%)

68 (69.39%)

 • Separated

1 (0.48%)

1 (1.02%)

 • Divorces

2 (0.97%)

1 (1.02%)

 • Widowed

55 (26.57%)

25 (25.51%)

 • Cohabitating

4 (1.93%)

0 (0.00%)

Employment status [No of participants (%)]

0.19

 • Government employee

6 (2.90%)

4 (4.08%)

 • Non-government employee

10 (4.83%)

7 (7.14%)

 • Self-employed

9 (4.35%)

7 (7.14%)

 • Non-paid

0 (0.00%)

0 (0.00%)

 • Student

0 (0.00%)

0 (0.00%)

 • Homemaker

12 (5.80%)

10 (10.20%)

 • Retired

170 (82.13%)

70 (71.43%)

 • Unemployed

0 (0.00%)

0 (0.00%)