Table 1.

Changes of sleep time and sleep latency in minutes in acute morphine withdrawal rats.

	Baseline (B)	Withdrawal (W)	W/B (%)	P-value
NREM sleep	145.6  ±  12.93	76.34  ±  11.74	52.43	.0001
REM sleep	5.284  ±  1.192	1.610  ±  0.5483	30.47	.0030
Total sleep time	150.9  ±  13.25	77.95  ±  11.98	51.66	.0001
Sleep latency	22.59  ±  3.759	29.31  ±  4.305	129.75	.0260

All the values in this table are min  ±  SEM.