Table 4. Adjusted means (95% CL) for continuous hematologic variables across quartiles of MVPA in U.S. adults ≥ 20 years (NHANES 2003–2006).
| MVPA | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | ptrend | |||||||||
| Mean | 95% CL | Mean | 95% CL | Mean | 95% CL | Mean | 95% CL | ||||||
| White blood cell count (1000 cells/μL) | |||||||||||||
| Model 1a | 7.3 | 6.8 | 7.8 | 7.0 | 6.6 | 7.5 | 6.6 | 6.2 | 7.1 | 6.4 | 6.0 | 6.8 | <0.001 |
| Model 2b | 7.6 | 7.1 | 8.2 | 7.4 | 6.9 | 8.0 | 7.3 | 6.8 | 7.8 | 7.1 | 6.7 | 7.6 | <0.001 |
| Red blood cell count (million cells/μL) | |||||||||||||
| Model 1a | 4.8 | 4.7 | 5.0 | 4.9 | 4.7 | 5.0 | 4.8 | 4.7 | 5.0 | 4.8 | 4.6 | 4.9 | 0.068 |
| Model 2c | 4.6 | 4.5 | 4.8 | 4.7 | 4.5 | 4.8 | 4.6 | 4.5 | 4.8 | 4.6 | 4.5 | 4.8 | 0.463 |
| Platelet count (1000 cells/μL) | |||||||||||||
| Model 1a | 270.2 | 253.1 | 288.2 | 271.5 | 254.1 | 289.9 | 262.6 | 246.7 | 279.4 | 262.3 | 244.9 | 280.6 | 0.003 |
| Model 2d | 266.7 | 250.2 | 284.0 | 266.8 | 250.6 | 283.8 | 259.8 | 245.8 | 274.3 | 261.4 | 246.6 | 276.9 | 0.086 |
Data are back-transformed adjusted means (95% CL). MVPA = moderate-vigorous physical activity. Quartile cut points are 7.0 17.5, 34.3 minutes/day.
a Adjusted for age, sex, race/ethnicity, wear time.
b Adjusted for age, sex, race/ethnicity, wear time, sedentary time, time of year, HEI-2015 score, current illness (flu, pneumonia, or ear infection), asthma, donated blood, poverty income ratio, BMI, smoking status, marital status.
c Adjusted for age, sex, race/ethnicity, wear time, sedentary time, time of year, HEI-2015 score, asthma, anemia, blood transfusion, arthritis, cancer or malignancy, poverty income ratio, BMI, marital status, smoking status.
d Adjusted for age, sex, race/ethnicity, wear time, sedentary time, time of year, HEI-2015 score, current illness (flu, pneumonia, or ear infection), donated blood, blood transfusion, asthma, arthritis, cancer or malignancy, BMI, marital status, smoking status, poverty income ratio.