The non-inferiority trial design precludes us from having a primary outcome based on six month quit rates.
The sample size is adequately powered to also evaluate the non-inferiority of cytisine on two month quit rates.
Removing these participants from per protocol analysis of six month quit rates is likely to significantly reduce the power of the study.
Among those smokers who completed the intervention, six and twelve month quit rates of 16%and13%3% were achieved but the absence of a comparable control group precludes interpretation of these findings as a measure of intervention effectiveness.
Instead the primary outcome will be based on a one month assessment of quit rates, with six month quitting variables collected as secondary outcomes.
Anne Kresse (Stanford '91, U.C.L.A. '98), who had been working four days a week as a senior marketing manager and spending one day with Jackson, switched to three days, then just last month, quit completely.
Fourteen of these (0.7%) were classified as a 12-month quit attempt and 1940 (99.3%) as smoking continuation.
The six-month quit rate was 22%.
This month, he quit one of his two jobs as a massage therapist to devote more time to creating videos.
Last month, three board members quit and the company replaced its chief financial officer in July.
