Table 1.

Characteristics of the subjects in the three surveys.

Characteristics	First survey	Second survey	Third survey
Male/Female (no)	1/27	1/42	1/41
Age (years)	46 (30-65)	50 (33-63)	50.5 (34-64)
Duration of work experience (years)	17 (5-30)	21 (5-34)	22 (6-35)
Auxiliary Nurses/Registered Nurses (no)	6/22	11/22	11/31
Work experience: Medicine/Surgery (no)	28/0	26/17	26/16
Size of position (percentage)	75 (50-100)	75 (50-100)	75 (50-100)

The results are given as numbers (no) or median with range in brackets.