Table 6. Observed counts (expected counts) and % within seniority for the chi-square test of association between seniority and participation in post-marketing examinations.

Participation in post-marketing examinations	Seniority				Observed Total
	Less than 5 years	From 6 to 15 years	From 16 to 25 years	Over 26 years
Yes	3 (6.5) 7.3%	16 (11.9) 21.3%	18 (13.3) 21.4%	12 (17.4) 10.9%	49
No	38 (34.5) 92.7%	59 (63.1) 78.7%	66 (70.7) 76.6%	98 (92.6) 89.1%	261
Observed Total	41	75	84	110	310