Table 3.
Subjective sleep quality assessed by Pittsburgh sleep quality inventory (PSQI) and health assessed by short form-36 before and after supplementation with tart Montmorency cherry concentrate or an isoenergetic placebo
(Mean values and standard deviations)
| n | Cherry | Placebo | Mixed model | ||||
|---|---|---|---|---|---|---|---|
| Mean | sd | Mean | sd | Effect | P-value | ||
| Sleep Latency (min) | 49 | ||||||
| Baseline | 16·3 | 9·4 | 17·6 | 9·6 | T | 0·672 | |
| 3 months | 20·8 | 14·6 | 21·7 | 13·5 | T × V | 0·932 | |
| Sleep Duration (min)* | 50 | ||||||
| Baseline | 434 | 63 | 398 | 28 | T | 0·015 | |
| 3 months | 421 | 54 | 409 | 38 | T × V | 0·197 | |
| Habitual Sleep Efficiency (%) | 50 | ||||||
| Baseline | 90·0 | 7·0 | 86·8 | 7·1 | T | 0·308 | |
| 3 months | 84·7 | 8·5 | 84·5 | 10·9 | T × V | 0·380 | |
| Global PSQI score | 49 | ||||||
| Baseline | 4·0 | 1·6 | 5·0 | 1·8 | T | 0·092 | |
| 3 months | 4·3 | 1·6 | 4·5 | 1·9 | T × V | 0·278 | |
| General health (%) | 49 | ||||||
| Baseline | 67 | 19 | 71 | 18 | T | 0·462 | |
| 3 months | 68 | 13 | 69 | 15 | T × V | 0·569 | |
| Health change (%) | 47 | ||||||
| Baseline | 58 | 12 | 58 | 14 | T | 0·269 | |
| 3 months | 56 | 11 | 51 | 14 | T × V | 0·391 | |
Effects are treatment (T) and treatment by visit interaction (T × V).
*
Significant difference between treatments (P < 0·05).