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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Integr Med (Encinitas). 2013 Jun;12(3):38–46.

Table 2.

Age Distribution and DRC levels in the BC Group and the Control Groupa,b

Age Groups, y BC Group n (%) Control Group n (%) Total n (%) BC Group Mean DRC (95% CI) Control Group Mean DRC (95% CI) Mean DRC Difference (95% CI)
20–40 37 (11.9) 91 (17.4) 128 (15.3) 2.6 (1.9–3.2) 6.5 (5.7–7.3) 4.0 (2.6–5.3)
41–60 160 (51.3) 300 (57.2) 460 (55.0) 2.7 (2.4–3.1) 6.3 (6.0–6.7) 3.6 (3.1–4.1)
>60 115 (36.8) 133 (25.4) 248 (29.7) 2.8 (2.5–3.2) 5.9 (5.4–6.4) 3.1 (2.4–3.7)
Total 312 (100.0) 524 (100.0) 836 (100.0) 2.8 (2.5–3.0) 6.3 (6.0–6.5) 3.5 (3.1–3.9)

Abbreviations: BC = breast cancer; DRC = DNA repair capacity; CI = confidence interval.

a

Age distribution of women with BC and cancer-free women: χ2 test for trend = 13.1, P < .001.

b

Participants were recruited from 2006 to 2010.