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Summary statistics and Pearson correlation coefficients of PSS scores at each visit
| Visit | n subjects | Mean (SD) | Visit 1 | Visit 2 | Visit 3 | Visit 4 |
|---|---|---|---|---|---|---|
| 1 | 987 | 26.8 (6.8) | 1.00 | 0.44 | 0.24 | 0.20 |
| 2 | 699 | 26.4 (6.7) | 1.00 | 0.32 | 0.36 | |
| 3 | 410 | 25.3 (7.6) | 1.00 | 0.34 | ||
| 4 | 148 | 25.6 (8.2) | 1.00 |
