Table 3. Baseline characteristics of 209,686 men in UK Biobank according to observed red blood cell, platelet and white blood cell at initial assessment.
| Fifths of observed red blood cell count | Fifths of observed platelet count | Fifths of observed white blood cell count | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 3 | 5 | 1 | 3 | 5 | 1 | 3 | 5 | |
| No. of men | 41,446 | 41,786 | 41,034 | 41,102 | 41,230 | 41,157 | 41,325 | 41,892 | 41,266 |
| Age at recruitmenta, y | 58.5 (7.7) | 56.3 (8.2) | 55.1 (8.4) | 57.9 (8.1) | 56.5 (8.2) | 55.6 (8.1) | 55.2 (8.2) | 56.8 (8.1) | 57.4 (8.1) |
| BMIa, kg/m2 | 27.1 (4.4) | 27.8 (4.1) | 28.6 (4.2) | 28.0 (4.3) | 27.8 (4.2) | 27.8 (4.3) | 26.7 (3.7) | 27.9 (4.0) | 28.8 (4.9) |
| Height1, cm | 175.2 (6.9) | 175.9 (6.8) | 175.5 (6.9) | 176.2 (6.9) | 175.8 (6.8) | 174.7 (6.8) | 176.7 (6.8) | 175.6 (6.8) | 174.5 (6.8) |
| Smoking, n (%) | |||||||||
| Never | 17,891 (42.6) | 21,231 (49.9) | 22,203 (53.8) | 20,969 (50.0) | 20,816 (49.7) | 18,965 (45.6) | 24,491 (58.2) | 21,593 (50.9) | 14,856 (35.6) |
| Former | 17,686 (42.1) | 16,128 (37.9) | 14,012 (33.9) | 16,087 (38.4) | 15,962 (38.1) | 15,834 (38.1) | 15,099 (35.9) | 16,675 (39.3) | 15,175 (36.4) |
| Current | 6,199 (14.7) | 4,981 (11.7) | 4,779 (11.6) | 4,618 (11.0) | 4,874 (11.6) | 6,531 (15.7) | 2,283 (5.4) | 3,909 (9.2) | 11,320 (27.1) |
| Educational level, n (%) | |||||||||
| No degree | 7,466 (17.8) | 8,034 (18.9) | 7,993 (19.4) | 7,545 (18.0) | 7,831 (18.7) | 8,059 (19.4) | 2,219 (17.9) | 7,915 (18.7) | 8,220 (19.7) |
| Degree | 25,817 (61.4) | 29,400 (64.1) | 27,963 (62.6) | 26,592 (63.4) | 26,816 (63.9) | 25,283 (60.3) | 28,971 (68.9) | 27,044 (63.8) | 23,223 (55.7) |
| Physical activity, n (%) | |||||||||
| Low | 10,684 (25.4) | 11,448 (26.9) | 12,680 (30.7) | 11,228 (26.8) | 11,308 (27.0) | 12,124 (29.1) | 9,644 (22.9) | 11,480 (27.1) | 13,588 (32.6) |
| Moderate | 20,036 (47.7) | 20,606 (48.4) | 19,052 (46.1) | 20,485 (48.8) | 20,147 (48.1) | 19,116 (45.9) | 21,429 (50.9) | 20,422 (48.1) | 18,190 (43.6) |
| High | 9,991 (23.8) | 9,247 (21.7) | 7,958 (19.3) | 8,958 (21.4) | 9,186 (21.9) | 8,874 (21.3) | 9,886 (23.5) | 9,215 (21.7) | 8,295 (19.9) |
| Ethnicity, n (%) | |||||||||
| White | 40,320 (95.9) | 40,481 (96.3) | 36,815 (87.6) | 38,949 (92.9) | 39,514 (94.2) | 39,326 (93.8) | 38,872 (92.4) | 40,164 (94.7) | 39,330 (94.3) |
| Not white | 1,485 (3.5) | 1,870 (4.4) | 4,207 (10.2) | 2,714 (6.5) | 2,164 (5.2) | 2,057 (5.0) | 2,964 (7.0) | 2,026 (4.8) | 2,137 (5.1) |
| Diabetes at baseline, n (%) | |||||||||
| No | 37,762 (89.8) | 39,862 (93.6) | 38,456 (93.1) | 38,097 (90.8) | 39,100 (93.2) | 38,559 (91.9) | 40,243 (95.7) | 39,510 (93.1) | 36,720 (88.0) |
| Yes | 4,089 (9.7) | 2,526 (5.9) | 2,544 (6.2) | 3,601 (8.6) | 2,625 (6.3) | 2,812 (6.8) | 1,652 (3.9) | 2,700 (6.4) | 4,727 (11.3) |
| Marital status, n (%) | |||||||||
| Married | 31,181 (73.9) | 32,935 (77.0) | 31,388 (75.5) | 32,116 (76.6) | 32,328 (77.1) | 30,742 (73.3) | 32,689 (77.4) | 32,865 (77.1) | 29,637 (70.5) |
| Not married | 10,853 (25.7) | 9,638 (22.5) | 9,906 (23.8) | 9,822 (23.4) | 9,565 (22.8) | 10,866 (25.9) | 9,370 (22.2) | 9,553 (22.4) | 12,092 (28.8) |
Percentages may not match due to missing data.
a
Values are means (SD).
Abbreviations: BMI= body mass index; SD= standard deviation