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Mean serum melatonin levels (pg/mL) pre- and post-trial among diabetic patients with insomnia within treatment groups.
| Serum melatonin level (pg/mL) | T1 | T2 | T3 | T4 | |
|---|---|---|---|---|---|
| Difference (mean ± SD) | Pre-trial | 7.03 ± 2.32 | 5.79 ± 2.43 | 6.26 ± 1.90 | 6.12 ± 2.25 |
| Post-trial | 6.84 ± 1.61 | 6.17 ± 2.07 | 6.50 ± 1.78 | 15.37 ± 17.37 | |
| p-value | 0.502 | 0.047 | 0.189 | 0.001 | |
T1: Placebo (starch tablets 250 mg × 2).
T2: Magnesium (250 mg × 2).
T3: Potassium (250 mg × 2).
T4: Magnesium + potassium (250 mg × 2).
