Kremer et al. [ 54] reported that the elasticities of these other direct-to-doctor instruments are significant, but modest in size.
The remittance instrument is significant and has the same sign for both genders.
The threshold instrument is significant at the 1% level and the first stage F statistic is 10.5, suggesting that a weak instrument bias is not a substantial concern in this context.
Notice the stronger underestimation and change in the overall shape for all latitudes clearly visible in September 2009 when the state of the GOME-2 instrument was significant altered after a throughput test.
The marginal effects for the Probit model and the IV Probit are also reported in Table 8.c In the two-stage least squares estimation and the IV Probit, the first-stage estimation shows that our instrument is significant (refer to Table 7 for test statistics).
Whilst there were minimal within-tester differences in time taken to score with iCAHE, or AGREE II instruments, there were significant between-tester differences (p < 0.05) when using either instrument.
For nearly all reference instruments there were significant differences in mean scores between respondents with and without problems in the various EQ-5D items and strong correlations with the EQ Visual Analogue Scale and the EQ-5D index scores.
In subjects without cognitive impairment, among the six possible pairings of preference measurement instruments, there were significant correlations between three pairings (VAS TTO, rho = 0.19, P = 0.018; SG TTO, rho = 0.36, P < 0.001; SG WTP, rho = -0.33, P < 0.001) and a trend towards significance with another pairing (VAS:WTP, rho = 0.16, P = 0.054).
A declining trend was apparent for death in low mortality health resource groups, and an increasing trend for decubitus ulcer and two obstetric trauma indicators: vaginal delivery with and without instrument (these trends were significant at the 1% level).
Differences in the MTF measurements between instruments were statistically significant, with an agreement of ±0.12 within the 95% confidence interval.
