Table 4.

Urinary nitrous oxide concentration in μg/l

Site	Date	Dentist	Assistant
1	05.12.13	8.26	6.89
1	11.06.14	5.35	4.31
1	17.11.14	12.6	9.43
1	12.06.15	*	7.89
2	02.07.15	2.87	2.54
1	26.11.15	8.47	6.23
2	18.01.16	4.35	6.56
2	28.07.16	4.26	4
1	29.07.16	11.21	8.34
2	16.01.17	16.6	18.7
1	17.02.17	25.4	15.6
Mean Values		9.94	8.23

*missing