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. 2023 Sep 1;19(9):1669–1675. doi: 10.5664/jcsm.10648

Table 5.

Between-group differences in Oura ring outcomes.

Oura Measure Group P
Sham Active
Time in bed (min) 3.02 (37.60) 1.71 (37.56) .929
Total sleep time (min) 7.26 (23.38) 1.52 (21.80) .512
Sleep efficiency (%) 0.75 (4.12) −0.24 (2.69) .541
Light (min) 4.68 (21.03) 0.24 (20.55) .584
REM (min) 5.30 (14.83) −3.56 (10.86) .073
Deep (min) −2.72 (11.01) 4.84 (11.78) .102
Light (%) −0.00 (0.03) 0.00 (0.03) .912
REM (%) 0.01 (0.03) −0.01 (0.02) .047*
Deep (%) −0.01 (0.04) 0.01 (0.04) .262
Total wake time (min) −4.25 (26.90) 0.18 (18.64) .601
Time to bed (time) −0.05 (0.28) −0.06 (0.52) .960
Time out of bed (time) 0.01 (0.66) −0.13 (0.60) .574

Data are presented as mean (standard deviation); t tests were performed on change scores pre- and postintervention. *Statistically significant. REM = rapid eye movement.