Table 2

Age, deprivation, screening attendance and participation in the Million Women Study






t-test – P value











Did not attend
Among


Attended screening
 screening
 Overall
 screened





Million Women Study

MWS




Screened
 participant

All eligible women
 Total
 Participant
 Non-participant
 Total
 vs not
 vs

n (%)
 n (%)
 n (%)
 n (%)
 n (%)
 screened
 non-participant
Age






     49–54
 353 (33)
 284 (32)
 195 (34)
 89 (29)
 69 (38)

     55–59
 286 (27)
 239 (27)
 147 (26)
 92 (29)
 47 (26)

     60+
 425 (44)
 359 (41)
 228 (40)
 131 (42)
 66 (46)

Mean age (95% CI)
 57.4
 57.5
 57.4
 57.7
 57.1
 0.4
 0.3

(57.1–57.7)
 (57.2–57.8)
 (57.0–57.8)
 (57.2–58.2)
 (56.4–57.8)

Deprivation level*






     Least deprived
 348 (33)
 303 (35)
 204 (36)
 99 (32)
 45 (25)

     Medium deprived
 348 (33)
 304 (35)
 186 (33)
 118 (38)
 44 (25)

     Most deprived
 351 (34)
 263 (30)
 170 (31)
 93 (30)
 88 (50)

Mean deprivation (95% CI)
 0.42
 0.22
 0.20
 0.26
 1.41
 < 0.0001
 0.8

(0.21–0.63)
 (-0.06–0.44)
 (-0.09–0.48)
 (-0.11–0.62)
 (0.89–1.92)

Total†
 1064 (100)
 882 (83)
 570 (54)
 312 (29)
 182 (17)

CI, confidence interval. *Measured by Townsend score. A higher score corresponds to more deprivation. †Numbers do not always add up to total due to missing values.

Banks et al. Breast Cancer Res 2002 4:R1   doi:10.1186/bcr418

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