Table 2.

The occurrence of sleep problems despite the feeling of fatigue after night and the level of sleepiness.

The occurrence of sleep problems despite experiencing fatigue after night shift	The level of sleepiness after the first night shift	The level of sleepiness after the second night shift	The level of sleepiness after the third night shift	Changing the level of sleepiness after 3 consecutive night shifts
Yes
Average	2.96	3.53	4.28	1.33
SD	0.92	0.78	0.88	1.18
No
Average	2.75	3.27	3.72	0.97
SD	1.04	0.95	1.05	1.10
Altogether
Average	2.86	3.41	4.02	1.16
SD	0.98	0.87	1.00	1.15
P	.1583	.0991	.0002	.0333
Using sleeping pills	The level of sleepiness after the first night shift	The level of sleepiness after the second night shift	The level of sleepiness after the third night shift	Changing the level of sleepiness after 3 consecutive night shifts
Yes
Average	3.24	3.76	4.57	1.33
SD	1.00	0.70	0.68	1.11
No
Average	2.80	3.36	3.94	1.14
SD	0.97	0.88	1.01	1.16
Altogether
Average	2.86	3.41	4.02	1.16
SD	0.98	0.87	1.00	1.15
P	.0454	.0646	.0047	.6107

P = statistical significance coefficient; SD = standard deviation.

The bold entries are statistically significant relationship.