TABLE 3.
Demographic variables, engagement metrics and heart rate data for males and females in both samples.
| Unscreened sample | Screened sample | |||||||
|---|---|---|---|---|---|---|---|---|
| Males | Females | Z a | p | Males | Females | Z | p | |
| M (SD) | M (SD) | M (SD) | M (SD) | |||||
| Total time on task (s) | 367.81 (173.45) | 396.84 (218.16) | 0.633 | .507 | 378.13 (176.02) | 401.52 (229.00) | 0.165 | .869 |
| Mean time per trial (s) | 21.64 (10.20) | 23.34 (12.83) | 0.633 | .507 | 22.24 (10.35) | 23.62 (13.47) | 0.165 | .869 |
| Mean engagement (dial turns) per trial | 26.03 (12.72) | 29.00 (16.22) | 1.36 | .174 | 26.21 (12.68) | 29.09 (16.71) | 0.894 | .372 |
| Number of valid trials | 18.80 (1.19) | 19.12 (0.96) | 1.941 | .052 | 18.93 (1.19) | 19.26 (0.87) | 1.391 | .164 |
| Resting heart rate (bpm) | 76.30 (9.79) | 79.23 (11.5) | 2.57 | .010 | 74.51 (9.60) | 78.95 (11.52) | 3.096 | .002 |
| Heart rate variability (SDNN) | 172.51 (93.17) | 172.38 (84.18) | 0.210 | .883 | 159.22 (91.56) | 168.37 (88.48) | 0.821 | .412 |
| Heart rate variability (RMSSD) | 135.99 (69.60) | 140.89 (63.92) | 0.763 | .445 | 127.92 (70.72) | 139.17 (66.54) | 1.191 | .233 |
| Heart rate variability (pNN50) | 47.42 (20.25) | 53.01 (17.73) | 2.352 | .019 | 45.60 (20.63) | 52.75 (18.04) | 2.351 | .019 |
| Age | 29.14 (9.86) | 26.15 (9.88) | 3.490 | <.001 | 29.04 (8.95) | 26.28 (9.26) | 2.678 | .007 |
| N | N | χ 2 | p | N | N | χ 2 | p | |
|---|---|---|---|---|---|---|---|---|
| Mental health (No conditions) b | 4(91) | 11(139) | 0.987 | .321 | 4(68) | 8(81) | 0.410 | .680 |
| Physical health (No conditions) b | 6(27) | 5(48) | 1.395 | .238 | 6(24) | 3(40) | 2.773 | .096 |
a
As the majority of data were not normally distributed, nonparametric tests were used for all comparisons of engagement and heart rate metrics.
b
Note that mental and physical health comparisons make use of available data. These data were not collected for all datasets.
Bold text indicates p values <.05.