Table 1.

Median of malondialdehyde deoxyguanosine adduct and interquartile range for different variables considered in the study plus the parameter estimates of the multivariate regression mode adjusted by age (continuous), smoking habit, breast cancer case-control status, tumour grade and pathological diameter, as appropriate.

	na	Medianb (25–75) percentiles	Means ratio	95% CIc	p
Age
< 50	12	2.5 (1.8–8.4)	1
50 –76	11	7.1 (4.3–11.3)	1.01	0.59–1.72	0.971
> 76	11	12.1 (6.4–23.5)	1.58	0.92–2.72	0.095
Smoking habit
Never smokersd	30	7.0 (2.3–12.1)	1
Current smokers	5	2.9 (1.9–5)	1.68	0.88–3.20	0.111
Status
Controlsd	13	1.8 (1.4–2.6)	1
Breast cancer cases	22	9.2 (6.9–15.2)	5.26	3.16–8.77	< 0.001
Tumour grade
Controlsd	13	1.8 (1.4–2.6)	1
G1	4	8.2 (6.9–10.7)	4.58	2.31–9.09	< 0.001
G2	6	8.0 (7.1–11.3)	5.38	2.82–10.25	< 0.001
G3	4	15.2 (12.2–15.4)	7.61	3.91–14.80	< 0.001
Pathologicaldiameter
Controlsd	13	1.8 (1.4–2.6)	1
pT1	12	8.8 (6.9–13.6)	5.07	2.92–8.79	< 0.001
pT2	8	13.2 (7.0–20.5)	5.75	3.13–10.59	< 0.001

^aSome figures do not add up to the total because of missing values.

^bLevel of M₁dG per 10⁸ normal nucleotides.

^cConfidence interval.

^dReference level.