Table 3

Sociodemographic characteristics and potential risk factors among post-menopausal participants of the MASTOS case control study

Variable

Controls (% of n = 817)a

Cases (% of n = 935)a

P-Value


Education Category

- Primary

395 (48.3)

394 (42.1)

0.044

- Secondary

277 (33.9)

334 (35.7)

- College

77 (9.4)

98 (10.5)

- University

62 (7.6)

96 (10.3)


Age at Interview

- < 45 years

4 (0.5)

57 (6.1)

< 0.001

- 45-54 years

187 (22.9)

263 (28.1)

- 55-64 years

488 (59.7)

383 (41.0)

- ≥ 65

138 (16.9)

232 (24.8)


Height

158.7 ± 6.2

159.1 ± 7.1

0.190b


BMI category

- < 20 (kg/m2)

6 (0.7)

20 (21.4)

0.001

- 20-24.9 (kg/m2)

190 (23.3)

216 (23.1)

- 25-29.9 (kg/m2)

323 (39.5)

326 (34.9)

- ≥ 30 (kg/m2)

201 (24.6)

303 (32.4)


Family History of BC

- No

750 (91.8)

770 (82.4)

< 0.001

- Yes

66 (8.1)

163 (17.4)


Age at Menarche

- ≥ 14

326 (39.9)

331 (35.4)

0.087

- 12-13

400 (49.0)

477 (51.0)

- > 12

87 (10.6)

123 (13.2)


Parity

- 0

65 (8.0)

88 (9.4)

0.251

- 1

56 (6.9)

68 (7.3)

- 2

330 (40.4)

403 (43.1)

- 3 or more

366 (44.8)

376 (40.2)


Age at FFTPc

- < 20

108 (13.2)

92 (9.8)

0.007

- 20 - < 25

378 (46.3)

397 (42.5)

- 25 - < 30

189 (23.1)

236 (25.2)

- ≥ 30

123 (15.1)

185 (19.8)


Breastfeeding

- Yes

574 (70.3)

606 (64.8)

0.015

- No

243 (29.7)

329 (35.2)


Oral Contraceptive use

- No

679 (83.1)

758 (81.1)

0.352

- Yes

137 (16.8)

172 (18.4)


HRT use

- No

572 (70.0)

794 (84.9)

< 0.001

- Yes

238 (29.1)

133 (14.2)


Smoking Status

- Never

676 (82.7)

747 (79.9)

0.003

- Past

53 (6.5)

102 (10.9)

- Current

88 (10.8)

84 (9.0)


Exercise

- No exercise

399 (48.8)

523 (55.9)

< 0.001

- Up to 3 hrs/wk

214 (26.2)

252 (27.0)

- > 3 and ≤ 6 hrs/wk

141 (17.3)

127 (13.6)

- > 6 hrs/wk

63 (7.7)

33 (3.5)


Mediterranean Diet Score - Panagiotakos

- ≤ 30

227 (27.8)

292 (31.2)

0.264

- 31-35

224 (27.4)

266 (28.4)

- 36-40

239 (29.3)

246 (26.3)

- > 40

127 (15.5)

131 (14.0)


Mediterranean Diet Score - Martinez-Gonzalez

- 0-4

258 (31.6)

322 (34.4)

0.429

- 5-6

237 (29.0)

242 (25.9)

- 6-7

196 (24.0)

221 (23.6)

- 8-9

126 (15.4)

150 (16.1)


a Failure of category counts to add up to this number, or of percentages to add up to 100 denotes missing values

b Mean (SD) and p-value of independent t-test. In all other cases, p-values of χ2 test are presented.

c First full-term pregnancy

Demetriou et al. BMC Cancer 2012 12:113   doi:10.1186/1471-2407-12-113

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