Table 3.
Specific statistical tests applied to the different measured parameters.
| Parameter measured | Statistical test employed |
|---|---|
| Demographics data | Fisher test for proportions |
| Perceived stress (PSS) (Q1) | Paired t-test |
| One way ANOVA to compare Aug 2017 data only | |
| A difference-in-difference regression model to compare the two populations over time | |
| Subjective well-being (SWEMWB) (Q3) | Paired t-test |
| Physical activity (Q4) | Paired t-test |
| Connectedness to nature (Q5) | Paired t-test |
| Diurnal salivary cortisol concentrations (Q2) | Repeated measures ANOVA (Log-transformed) |
| Salivary cortisol - Daily Average Concentration (DAC) (Q2) | Paired t-test |
| Simple linear regression (Log-transformed) | |
| Salivary cortisol – Total daily secretion (AUCg) (Q2) | Paired t-test |
| Simple linear regression | |
| Two-way repeated measures ANOVA (to determine effects of sampling time) | |
| Salivary cortisol concentration decline correlated with mental well-being (SWEMWB) (Q2 & Q3) | Simple linear regression |
| Proportion of normal diurnal cortisol profiles (Q2) | McNemar's test |