Table 1.
Messages for Trial One.
Fig 1.
CONSORT flow diagram for Trial One.
Table 2.
Trial One main results (raw data).
Table 3.
Trial One main results (multivariate logistic regression).
Fig 2.
The Specific Costs message produced a DNA rate of 8.4%, compared to a rate of 11.1% for the Control message (OR 0.74, 95% CI 0.61–0.89, P<0.01). None of the other messages had a significant effect on this outcome measure.
Table 4.
Trial One DNA results by speciality.
Table 5.
Trial Two messages.
Fig 3.
CONSORT flow diagram for Trial Two.
Table 6.
Trial Two main results and descriptive statistics (raw data).
Table 7.
Trial Two main results and covariates (multivariate logistic regression).
Fig 4.
The General Costs message was less effective at reducing DNAs than the Specific Costs message: it produced a DNA rate of 9.9%, compared to 8.2% for the Specific Costs message (OR 1.22, 95% CI 1.00 to 1.48, P = 0.046).
Table 8.
Trial Two, DNA results by speciality.