Table 2.
Descriptive statistics for untransformed cortisol measures at 6-month follow-up in the Cortisol Study, Nuevo Amanecer-II Randomized Controlled Trial, 2016–2018 (N = 76).
| Participants, N | Samples, N | Mean | (SD) | Range | |
|---|---|---|---|---|---|
| Awakening cortisol, ng/mL | 76 | 199 | 2.17 | (0.07) | 0.06–3.88 |
| CAR slopea,b | 68 | 176 | 0.10 | (0.37) | −2.33, 1.15 |
| Cortisol AUCga,b, thousands | 68 | 147 | 11.34 | (8.68) | 0.93, 36.66 |
| Hair cortisol concentrationc, pg/mg | 49 | 49 | 1751.6 | (1148.6) | 340.9, 6084.3 |
| Participants, N | Samples, N | N | (%) | 95% CI | |
| ≥40% change in CARa,b | 69 | 178 | 75 | (42.2) | 34.6, 49.9 |
Abbreviations: SD, standard deviation; CAR, cortisol awakening response; AUCg, area under the curve with respect to ground.
Participants were asked to provide salivary samples for 3 days. CAR slope and ≥40% change in CAR measures utilized awakening and 30-min post awakening cortisol values; cortisol AUCg measure utilized awakening, 30-min post awakening, and bedtime cortisol values.
Intercept-only linear and log-binomial regression was used to estimate the mean (standard deviation) and proportion of each cortisol measure, which allowed for the accounting of repeated measures.
Only one hair sample was collected per participant (intervention group: 22; control group: 27).