Table 4.

The level of sleepiness of the respondents and the declared level of impact of shift work on contacts with household members and with people from outside the household.

	Impact of shift work on hindering contact with family	Impact of shift work on hindering contacts with people from outside the household
The level of sleepiness after the first night shift
rho	0.173	0.226
P	.0266	.0036
The level of sleepiness after the second night shift
rho	0.203	0.225
P	.0091	.0038
The level of sleepiness after the third night shift
rho	0.121	0.201
P	.1221	.0099
Changing the level of sleepiness after 3 consecutive night shifts
rho	−0.078	−0.054
P	.3200	.4946

P = statistical significance coefficient; rho = Spearman rank correlation.

The bold entries are statistically significant relationship.