Table 2.
Comparison of the PIN3 physical activity questionnaire to the diary card using Spearman correlation coefficients (SCC) with 95% confidence intervals (CI)
| Comparison Variables* | Diary Card (n = 177) SCC (95% CI) |
|---|---|
| Questionnaire using perceived intensity (hours/week) | |
| Total physical activity | 0.67 (0.57, 0.76) |
| Moderate activity | 0.63 (0.52, 0.73) |
| Vigorous activity | 0.68 (0.56, 0.79) |
| Moderate to vigorous activity | 0.66 (0.56, 0.76) |
| Questionnaire using absolute intensity (MET-hours/week) | |
| Total physical activity | 0.63 (0.53, 0.73) |
| Moderate intensity defined as 3-6 METS | |
| Moderate activity | 0.62 (0.52, 0.73) |
| Vigorous activity | 0.53 (0.39, 0.67) |
| Moderate to vigorous activity | 0.60 (0.49, 0.70) |
| Moderate intensity defined as 4.8-7.1 METS | |
| Moderate activity | 0.61 (0.49, 0.74) |
| Vigorous activity | 0.47 (0.29, 0.64) |
| Moderate to vigorous activity | 0.69 (0.58, 0.80) |
* The diary card and questionnaire variables compared to each other were intended to assess the same intensities of physical activity.