Fig. 6

Intentional use of lethal drugs administered by professionals with patient request. Note: See Fig. 2 for abbreviations. X² = 8678 (null hypothesis: all frequencies the same), p < 0.001 (simulated). The coefficient of year = 0.0159, p < 0.001 among all surveys; greater than zero suggesting positive changes from 1990 to 2010, lower suggesting the opposite). The coefficient of year = 0.0142, p < 0.001 among Dutch surveys. The coefficient of year = 0.0730, p < 0.001 among Belgian surveys. See Appendix 3 for regression coefficients