Table 1. Baseline characteristics across categories of total white blood cell (WBC) count in subjects who developed cancer and subjects who did not develop cancer during follow-up.
|
Categories of WBC count (109 cells/L)
|
P for trend | |||
|---|---|---|---|---|
| < 6.4 | 6.4-8.5 | ≥ 8.6 | ||
| Cancer | ||||
| Subjects (n) | 671 | 688 | 361 | - |
| Age (years) | 58.5 ± 13.3 | 58.2 ± 13.6 | 55.6 ± 12.8 | 0.002 |
| Sex (female) | 49.0 (329) | 51.2 (352) | 48.5 (175) | 0.9 |
| BMI (kg/m2) | 25.9 ± 4.0 | 25.8 ± 4.2 | 25.3 ± 3.9 | 0.06 |
| Daily smoking | 21.0 (141) | 44.0 (303) | 70.6 (255) | <0.001 |
| Physical activity (hard) | 24.7 (164) | 21.3 (145) | 16.9 (60) | 0.003 |
| Self-reported DM | 2.7 (18) | 3.8 (26) | 3.6 (13) | 0.3 |
| Self-reported CVD | 11.2 (75) | 12.4 (85) | 9.4 (34) | 0.5 |
| Non-cancer | ||||
| Subjects (n) | 8884 | 9214 | 4486 | - |
| Age (years) | 46.1 ± 14.9 | 45.7 ± 14.6 | 43.5 ± 13.1 | <0.001 |
| Sex (female) | 49.7 (4414) | 53.0 (4884) | 54.7 (2455) | <0.001 |
| BMI (kg/m2) | 24.9 ± 3.6 | 25.3 ± 3.9 | 25.2 ± 4.0 | <0.001 |
| Daily smoking | 19.0 (1689) | 39.3 (3618) | 66.0 (2963) | <0.001 |
| Physical activity (hard) | 35.3 (3121) | 30.1 (2753) | 27.4 (1218) | <0.001 |
| Self-reported DM | 1.3 (118) | 1.9 (172) | 1.4 (64) | 0.3 |
| Self-reported CVD | 5.3 (475) | 6.4 (592) | 5.6 (252) | 0.2 |
The Tromsø Study 1994-2007.
Values are given as mean ± 1 standard deviation or as percentages with absolute numbers in parentheses.
Physical activity (hard) ≥ one hour per week of activity that caused sweating or breathlessness.
BMI = Body mass index
DM = Diabetes mellitus
CVD = Cardiovascular disease