The agreement between workers and within workers in regard to occupational exposure to mercury in dental practice assessed from a questionnaire and an interview

Table 3 Percent of concordance between pairs that worked in the same clinic in the same years and during 1980 to 1990.

Question	Comparisons (number of pairs)	Percent of pairs that
		agree	Partly agree ¹	Partly Disagree ²	Total disagree
Did the Dentomat produce soft or firm amalgam?	All (31)	64.5			35.5
	both dental nurses (16)	68.8			31.2
	one dentist and one dental nurse (14)	57.1			42.9
	both dentists (1)	100
How often was the Dentomat filled?	All (30)	23.3	46.7	26.7	3.3
	both dental nurses (15)	33.3	46.7	20	0
	one dentist and one dental nurse (15)	13.3	46.7	33.3	6.7

The question on soft or firm amalgam had a dichotomous outcome, while the question on how often the Dentomat was filled had the answers; more often than once a week, once a week, once every second week, and more seldom than every second week.
¹Answers next to each other on a scale i-iv
²Answers two positions from each other on a scale i-iv

ISSN: 1745-6673