The intervention group also developed fewer keratotic lesions ( mean difference -1.4 , -2.5 to -0.2 , p = .021 ) , were less likely to report the use of co-interventions ( relative risk [ RR ] 0.74 , 0.56 to 0.98 , p = .026 ) and were more likely to report that their foot pain had moderately or markedly improved during the study ( RR = 7.93 , 2.51 to 25.00 , p < .001 ; number needed to treat = 3 , 2 to 5 ) .