Table 4.

DNA damage [Mean ± SD]according to main individual characteristics of participants to the GIBIEX study [values at T0]

Characteristics	N	IDN 5933 [TI%]	N	Placebo [TI%]	p-value*
TI% T0	27	7.12 ± 4.72	20	8.30 ± 3.83
					NS
TI% T1	27	6.03 ± 4.06	20	7.15 ± 4.43
AgeTertiles
65–77 y.	11	8.15 ± 6.51	6	7.33 ± 2.87	NS
78–85 y.	8	6.23 ± 3.09	7	9.51 ± 4.83
≥ 86 y.	8	6.59 ± 3.16	7	7.94 ± 3.67
Sex
Male	9	9.31 ± 4.78	9	7.06 ± 2.28	NS
Female	18	6.03 ± 4.43	11	9.32 ± 4.60
Marital Status
Unmarried	8	7.92 ± 6.35	3	8.42 ± 5.23	NS
Married	5	6.72 ± 3.82	4	5.66 ± 2.36
Divorced	1	6.07 ± 0	–	–
Widower	11	7.39 ± 4.61	11	9.63 ± 3.88
Education
No qualify/Elementary	13	8.52 ± 5.22	14	8.45 ± 4.01	NS
Middle School	–	–	4	8.70 ± 4.06
High School/University	4	3.97 ± 1.60	–	–
Smoking habit
Never	13	6.91 ± 4.27	7	11.32 ± 3.79	NS
Current Smoker	4	4.77 ± 1.36	3	6.35 ± 2.51
Ex-smoker	7	9.52 ± 6.52	5	8.36 ± 3.63
Not responding	3	5.57 ± 3.91	5	5.19 ± 0.99

^*t-test quantitative [for unequal variances] or Chi square qualitative [NS: p > 0.05]. Row data are shown in Additional file 4