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Table 1 Efficacy of shorter reduction programmes versus standard length

From: A randomised trial of nicotine assisted reduction to stop in pharmacies - the redpharm study

    80% power 90% power
Base quit proportion RR Quit proportion in intervention N in each arm N in each arm
0.21 1.7 0.357 146 195
0.21 1.8 0.378 114 152
0.21 1.9 0.399 91 122