Assessment Period | Cohort M | SD | National Norm M | t | P |
January 2020 | 463.46 | 48.89 | 552.5 | −23.67 | <0.001 |
August 2020 | 477.17 | 52.77 | 557.5 | −19.79 | <0.001 |
January 2021 | 492.56 | 48.70 | 590.5 | −26.14 | <0.001 |
May 2021 | 507.39 | 47.81 | 616.0 | −29.53 | <0.001 |
August 2021 | 506.06 | 44.75 | 616.0 | −31.94 | <0.001 |