Table 2.
Results of Hierarchical Linear Regression Models Testing for Changes in Perceived Physical Symptoms, and Oura-Ring Derived Measures of Sleep Distal Temperature, Heart Rate (HR), and HRV, in 26 Young Women Across Four Phases of the Menstrual Cycle (Menses (Me), Ovulation (Ov), Midluteal (ML), and Late Luteal (LL). Menses is the Constant Term and Participant is Included as Random Effect
| Variable | Coefficient | SE | 95% CI |
|---|---|---|---|
| Perceived physical symptoms | |||
| Ovulation | −1.12* | 0.26 | [−1.65, −0.60] |
| Mid luteal | −1.07* | 0.26 | [−1.60, −0.55] |
| Late luteal | −0.68* | 0.26 | [−1.20, −0.16] |
| Distal skin temperature | |||
| Ovulation | −0.093* | 0.047 | [−.187, 0.001] |
| Mid luteal | 0.198* | 0.048 | [0.103, 0.293] |
| Late luteal | 0.242* | 0.047 | [0.148, 0.336] |
| Heart rate | |||
| Ovulation | 0.711 | 0.69 | [−.67, 2.09] |
| Mid luteal | 2.38* | 0.70 | [0.98, 3.78] |
| Late luteal | 2.49* | 0.69 | [1.11, 3.88] |
| rMSSD (vagal-related HRV) | |||
| Ovulation | −3.17 | 2.76 | [−8.66, 2.33] |
| Mid luteal | −5.47 | 2.79 | [−11.03, 0.097] |
| Late luteal | −5.96 | 2.76 | [−11.45, 0.47] |
Note: *Significantly different from menses (see text for details).
Abbreviations: CI, confidence interval; HRV, heart rate variability; rMSSD, square root of the mean squared differences of successive NN intervals; SE, standard error.