Payments to the Japanese Society of Gastroenterology board members and authors of clinical practice guidelines issued by the Japanese Society of Gastroenterology between 2016 and 2021
| Physician with payments | Payment per gastroenterologist, US$ | Relative payments | ||||||
| Number (%) | Average (SD) | Median (IQR) | P value* | Relative risk for receiving payments (95% CI) | P value | Relative monetary value (95% CI) | P value | |
| Board membership | ||||||||
| Non-board members | 11 599 (52.7) | 3876 (18 734) | 284 (0‒1701) | <0.001 | Ref. | <0.001 | Ref. | <0.001 |
| Board membership | 24 (100) | 162 576 (127 573) | 132 777 (79 771‒215 036) | 1.6 (1.4 to 1.7) | 29.9 (19.0 to 47.2) | |||
| Clinical practice guideline | ||||||||
| Non-guideline author gastroenterologists | 11 414 (52.4) | 3412 (15 918) | 284 (0‒1633) | <0.001 | Ref. | <0.001 | Ref. | <0.001 |
| Gastroenterologists authoring guideline without chairpersonship | 174 (88.8) | 48 523 (80 763) | 11 131 (1801‒61 293) | 1.7 (1.6 to 1.8)† | 17.3 (13.9 to 21.6)† | |||
| Gastroenterologists authoring guideline with chairpersonship | 35 (100) | 151 697 (148 056) | 106 069 (25 556‒289 914) | |||||
*The difference in payments per gastroenterologist was evaluated by the Mann-Whitney U test for two groups and Kruskal-Wallis H test for three or more groups.
†To stabilise the multiple Poisson and negative binomial regression model, the guideline authors and guideline chairpersons integrated into one category.