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. 2017 Sep 19;12(9):e0184862. doi: 10.1371/journal.pone.0184862

Table 5. Associations between doctors’ seniority and different methods of cooperation between Polish doctors and the pharmaceutical industry in the 12 months preceding the survey.

Means of cooperation Less than 5 years 6–15 years 16–25 years Over 26 years Statistic parameters Total
1. Participation as an audience member in a conference, presentation, meeting, or educational training organized by a pharmaceutical company. 80.5% 78.7% 84.5% 82.7% χ2(3) 1.0, p = .79 81.9%
2. Participation as a presenter in a conference, presentation, meeting, or educational training organized by a pharmaceutical company. 7.3% 12.0% 17.9% 19.1% χ2(3) 4.3, p = .23 15.5%
3. Participation in post-marketing examinations (Phase IV trials): completing a questionnaire about the reaction of patients to a medicine produced by a company. 7.3% 21.3% 21.4% 10.9% χ2(3) 7.9, p < .05 15.9%
4. Participation in a marketing survey sponsored by a pharmaceutical company about the work of pharmaceutical sales representatives. 19.5% 14.7% 17.9% 12.7% χ2(3) 1.5, p = .67 15.5%
5. Participation in free-for-patient examinations sponsored by a pharmaceutical company. 0.0% 5.3% 7.1% 4.5% χ2(3) 5.0, p = .17 likelihood ratio 4.9%
6. Writing or endorsement of articles about a drug or active substance at the request of a pharmaceutical company. 2.4% 4.0% 7.1% 0.0% χ2(3) = 10.5, p < .05 likelihood ratio 3.2%

Note. Total percentages do not add up to 100 because respondents could select all forms of cooperation engaged in during the previous 12 months.