Table 1

Prediagnostic demographic, lifestyle, and dietary characteristics of the study sample at recruitment and during follow-up: the Norwegian Women and Cancer Study (N=1861)

CharacteristicsCategories or parametersNumbers (%)AliveDied of
CRC
Died of other causes
Total cohort, n (%)18611201 (64.5)550 (29.6)110 (5.9)
Mean age at enrolmentYears (SD)
(range)
55.8 (7.3)
(41–75)
55.0 (6.9)
(41–75)
56.6 (7.5)
(41–74)
61.2 (7.4)
(41–75)
Mean age at diagnosisYears (SD)
(range)
66.4 (8.7)
(43–89)
66.4 (8.3)
(43–89)
65.5 (9.4)
(43–87)
70.6 (8.6)
(50–86)
Mean age at deathYears (SD)
(range)
69.0
(47–89)
67.6 (9.1)
(47–88)
75.9 (8.6)
(50–89)
Mean prediagnostic follow-up durationYears (SD)10.5 (5.4)11.3 (5.3)8.8 (5.2)9.3 (4.7)
Mean postdiagnosis survival durationYears (SD)5.0 (4.7)6.4 (5.0)2.1 (2.3)5.3 (4.3)
CRC stage, n (%)Localised452 (24.3)377 (31.4)32 (5.8)43 (39.1)
Regional spread972 (52.2)730 (60.8)188 (34.2)54 (49.1)
Remote metastases437 (23.5)94 (7.8)330 (60.0)13 (11.8)
Physical activity1–2 (least active)83 (5.2)46 (4.4)26 (5.4)11 (12.4)
3–4366 (22.7)236 (22.7)112 (23.3)18 (20.2)
5–6687 (42.6)458 (43.9)198 (41.3)31 (34.8)
7–8385 (23.9)248 (23.8)116 (24.2)21 (23.6)
9–10 (most active)90 (5.6)54 (5.2)28 (5.8)8 (9.0)
Body mass index, n (%)Underweight (<20.0)100 (5.5)52 (4.4)41 (7.7)7 (6.6)
Normal (20.0–24.9)883 (48.7)583 (49.6)253 (47.6)47 (44.4)
Overweight (25.0–29.9)640 (35.3)417 (35.5)188 (35.3)35 (3.0)
Obese ≥30.0190 (10.5)123 (10.5)50 (9.4)17 (16.0)
Duration of education<10 years658 (38.2)413 (36.9)197 (39.2)48 (48.0)
10–12 years583 (33.9)383 (34.2)171 (34.1)29 (29.0)
>12 years480 (27.9)323 (28.9)134 (26.7)23 (23.0)
Annual household income<300 000 NOK857 (50.7)515 (46.7)274 (55.8)68 (70.1)
301 000–600 000 NOK688 (40.6)483 (43.7)178 (36.3)27 (27.8)
>600 000 NOK147 (8.7)106 (9.6)39 (7.9)2 (2.1)
Alcohol intake (g/day)None472 (27.5)315 (28.3)119 (23.5)38 (38.4)
≤3.0 g720 (41.9)447 (40.2)231 (45.5)42 (42.4)
>3.0–10.0 g395 (23.0)259 (23.3)121 (23.9)15 (15.2)
>10.0 g131 (7.6)91 (8.2)36 (7.1)4 (4.0)
Smoking statusNever smoker627 (34.2)410 (34.7)173 (31.9)44 (40.7)
Former smoker666 (36.4)437 (37.0)202 (37.3)27 (25.0)
Current smoker538 (29.4)334 (28.3)167 (30.8)37 (34.3)
Red and processed meat intake combined (g/day)≤70.0 g1523 (81.8)986 (82.1)444 (80.7)93 (84.6)
>70.0 g338 (18.2)215 (17.9)106 (19.3)17 (15.4)
Fish intake (g/day)≤130 g1364 (73.3)890 (74.1)401 (72.9)73 (66.4)
>130 g497 (26.7)311 (25.9)149 (27.1)37 (33.6)
Fruit and vegetable intake (g/day)≤300 g1002 (53.8)629 (52.4)296 (53.8)77 (70.0)
>300 g859 (46.2)572 (47.6)254 (46.2)33 (30.0)
Vitamin D intake (μg/day)≤10.0 µg1340 (72.0)851 (70.9)411 (74.7)78 (70.9)
>10.0 µg521 (28.0)350 (29.1)139 (25.3)32 (29.1)
Diabetes mellitus, n (%)No1813 (97.4)1175 (97.8)532 (96.7)106 (96.4)
Yes48 (2.6)26 (2.2)18 (3.3)4 (3.6)
Cardiovascular diseasesNo1503 (80.8)981 (81.7)450 (81.8)72 (65.4)
Yes358 (19.2)220 (18.3)100 (18.2)38 (34.6)
  • CRC, colorectal cancer; NOK, Norwegian kroner; SD, standard deviation.