Table 1.
Baseline characteristics of participants according to decile of baseline white blood cell count (n = 29,925) in Guangzhou Biobank Cohort Study, 2003–2016
| Decile of White Blood Cell Count, × 109/L | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1st decile (f < 4. 5; m < 4.7) (n = 2845) | 2nd decile (f 4.5–4.8; m 4.7–5.2) (n = 2542) | 3rd decile (f 4.9–5.3; m 5.3–5.7) (n = 3516) | 4th decile (f 5.4–5.6; m 5.8–6.0) (n = 2725) | 5th decile (f 5.7–6.0; m 6.1–.4) (n = 3308) | 6th decile (f 6.1–6.3; m 6.5–6.8) (n = 2550) | 7th decile (f 6.4–6.8; m 6.9–7.2) (n = 3293) | 8th decile (f 6.9–7.3; m 7.3–7.8) (n = 2978) | 9th decile (f 7.4–8.2; m 7.9–8.7) (n = 3085) | 10th decile (f > 8.2; m > 8.8) (n = 3083) | P for difference | |
| Percentage | |||||||||||
| Men | 26.3 | 33.8 | 23.0 | 31.6 | 26.1 | 30.9 | 23.1 | 29.3 | 27.4 | 28.3 | < 0.001 |
| Education (college or above) | 11.5 | 12.0 | 10.0 | 10.1 | 9.7 | 8.3 | 7.0 | 8.2 | 7.0 | 6.2 | < 0.001 |
| Occupation (manual) | 56.5 | 57.1 | 58.2 | 59.2 | 59.5 | 61.1 | 63.4 | 63.7 | 65.1 | 66.5 | < 0.001 |
| Current smokers | 5.4 | 7.6 | 5.9 | 8.8 | 8.8 | 10.8 | 8.4 | 12.7 | 13.7 | 18.6 | < 0.001 |
| Current alcohol drinkers | 23.5 | 25.1 | 23.3 | 26.8 | 24.5 | 25.4 | 22.7 | 24.9 | 23.5 | 23.3 | < 0.001 |
| IPAQ Physical activity (active) | 49.6 | 48.5 | 50.4 | 51.3 | 52.6 | 52.1 | 52.0 | 50.6 | 50.4 | 50.7 | 0.006 |
| Self-rated health (good/very good) | 81.4 | 82.6 | 83.3 | 83.8 | 83.3 | 83.1 | 83.0 | 81.4 | 80.6 | 79.7 | < 0.001 |
| Diabetes | 5.9 | 7.4 | 8.7 | 9.7 | 10.9 | 11.5 | 13.5 | 16.0 | 18.5 | 21.1 | < 0.001 |
| Mean (SD) | |||||||||||
| Age, years | 61.3 (7.2) | 61.7 (7.1) | 61.2 (7) | 62 (7.2) | 61.8 (7.1) | 62 (7) | 62.1 (7) | 62.5 (7) | 62.6 (7.2) | 63 (7.1) | < 0.001 |
| Body mass index, kg/m2 | 22.2 (3.1) | 22.9 (3.1) | 23.3 (3.1) | 23.5 (3.1) | 23.8 (3.2) | 23.9 (3.2) | 24.2 (3.2) | 24.4 (3.3) | 24.5 (3.3) | 24.7 (3.5) | < 0.001 |
| Triglycerides, mmol/l | 1.2 (0.8) | 1.4 (1.0) | 1.5 (1.1) | 1.6 (1.2) | 1.7 (1.3) | 1.7 (1.2) | 1.8 (1.2) | 1.8 (1.4) | 2.0 (1.5) | 2 (1.5) | < 0.001 |
| HDL-cholesterol, mmol/l | 1.8 (0.4) | 1.7 (0.4) | 1.7 (0.4) | 1.6 (0.4) | 1.7 (0.4) | 1.6 (0.4) | 1.6 (0.4) | 1.6 (0.4) | 1.6 (0.4) | 1.6 (0.4) | < 0.001 |
| LDL-cholesterol, mmol/l | 3.15 (0.69) | 3.24 (0.72) | 3.27 (0.70) | 3.24 (0.69) | 3.28 (0.71) | 3.29 (0.71) | 3.27 (0.70) | 3.29 (0.70) | 3.28 (0.70) | 3.30 (0.73) | < 0.001 |
| Haemoglobin, g/l | 131.3 (13.7) | 134.9 (13.6) | 134.3 (12.9) | 136.3 (13) | 136.5 (12.9) | 137.4 (13.4) | 137.1 (12.9) | 138.1 (13.5) | 138.5 (13.8) | 139.8 (13.8) | < 0.001 |
| Platelet count, 109/l | 190.7 (51.3) | 204.7 (50.1) | 215 (62.7) | 218.7 (48.8) | 224.8 (50.9) | 230 (52.2) | 234.5 (57.8) | 239.5 (55.8) | 246.1 (55.4) | 262.8 (77.8) | < 0.001 |
| Waist circumference, cm | 82.67 (17.2) | 80.30 (9.14) | 81.23 (18.60) | 81.85 (9.10) | 82.60 (17.3) | 82.95 (8.98) | 83.79 (17.56) | 84.00 (9.09) | 84.13 (9.11) | 84.82 (8.90) | 0.32 |
| FEV1, L | 1.96 (0.52) | 2 (1.39) | 1.96 (3.65) | 1.92 (0.54) | 1.93 (1.67) | 1.91 (0.54) | 1.86 (1.24) | 1.9 (3.67) | 1.8 (0.52) | 1.75 (0.55) | < 0.001 |
| FVC, L | 2.52 (0.71) | 2.55 (0.71) | 2.44 (0.63) | 2.47 (0.65) | 2.42 (0.62) | 2.45 (0.66) | 2.36 (0.66) | 2.36 (0.67) | 2.33 (0.74) | 2.28 (0.68) | < 0.001 |