Table 3. Sleep length and architecture.
| Variable | Eating at night (mean ± SE) |
Not Eating at Night (mean ± SE) |
Condition | Day | Condition*Day | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| F(df) | pvalue | F(df) | pvalue | F(df) | pvalue | |||||
| TST (min) | 389.25 ± 7.25 | 387.72 ± 5.92 | 0.03(1,24) | 0.872 | 40.58(2,24) | <0.001 | 0.93(2,24) | 0.407 | ||
| WASO (min) | 35.38 ± 8.33 | 33.42 ± 6.80 | 0.03(1,8) | 0.860 | 1.60(2,16) | 0.233 | 0.22(2,16) | 0.806 | ||
| SE (%) | 89.13 ± 1.71 | 88.67 ± 1.40 | 0.04(1,24) | 0.840 | 3.26(2,24) | 0.056 | 0.716(2,24) | 0.499 | ||
| SOL (min) | 13.13 ± 5.79 | 18.17 ± 4.73 | 0.45(1,8) | 0.519 | 0.52(2,16) | 0.011 | 0.70(2,16) | 0.514 | ||
| REM (min) | 74.88 ± 5.51 | 83.28 ± 4.50 | 1.40(1,8) | 0.271 | 3.69(2,16) | 0.048 | 0.08(2,16) | 0.925 | ||
| Stage 1 (min) | 31.92 ± 4.65 | 35.19 ± 3.80 | 0.30(1,8) | 0.600 | 10.51(2,16) | 0.001 | 2.87(2,16) | 0.086 | ||
| Stage 2 (min) | 201.33 ± 7.60 | 185.11 ± 6.20 | 2.74(1,8) | 0.137 | 63.80(2,16) | <0.001 | 0.33(2,16) | 0.724 | ||
| Stage 3 (min) | 23.04 ± 2.65 | 19.69 ± 2.16 | 0.96(1,8) | 0.356 | 5.40(2,16) | 0.016 | 0.72(2,16) | 0.502 | ||
| Stage 4 (min) | 58.08 ± 7.13 | 64.44 ± 5.82 | 0.48(1,8) | 0.509 | 19.87(2,16) | <0.001 | 0.49(2,16) | 0.625 | ||
Data presented (n=10). TST: total sleep time; min: minute; WASO: wake after sleep onset; SE: sleep efficiency; SOL: sleep onset latency; REM: rapid eye movement. Results shown are from linear mixed model analyses with main effects of meal timing; eating at night/not eating at night and day; pre night shift (PRE), the second consecutive night shift (NS2), and return to day shift (RTDS) and their interactions (condition*day). Denominator df corrected with Satterthwaite approximation and reported to the nearest whole number (F value with degrees of freedom (df) displayed as subscript), and significance (pvalue) values were presented.