Table 1 Selected characteristic of 1,327 women diagnosed with breast cancer in the Norwegian Women and Cancer study with complete information on pre- and post-diagnostic physical activity (PA) levels, 1991-2011

Age at enrollment, mean (SD)

46.7 (7.0)

Age at breast cancer diagnosis, mean (SD)

53.3 (6.7)

Duration of mean follow-up, years (range)

10.6 (0.92–21.5)

Tumor stage, n (%)

 I

591 (44.5)

 II

534 (40.2)

 III

25 (1.8)

 IV

20 (1.5)

 Unknown

158 (11.9)

Cause of death, n (%)

 Breast cancer

155 (78.7)

 Other cancers

26 (13.2)

 Other causes

16 (8.1)

Postmenopausal at diagnosis (%)

1,202 (90.6)

Pre-diagnostic PA, mean (SD)

5.6 (1.85)

Post-diagnostic PA, mean (SD)

5.5 (1.83)

BMI (kg/m²) at enrollment, mean (SD)

23.6 (3.7)

BMI (kg/m²) after breast cancer diagnosis, mean (SD)

25.2 (4.0)

Hormone therapy use at enrollment (ever), n (%)

338 (23.8)

Comorbidities at enrollment, n (%)

 Diabetes

16 (1.1)

 Cardiovascular diseases

58 (4.1)

Smoking status at enrollment, n (%)

 Current

421 (31.9)

 Former

436 (33.1)

Pack-years smoked at enrollment (ever), mean (SD)

8.7 (7.7)

Alcohol consumption (g/day) at enrollment, mean (SD)

3.98 (5.0)

Education (years) at enrollment, mean (SD)

12.7 (3.5)