The intervention group also developed fewer keratotic lesions ( mean difference -@ , -@ to -@ , p = @ ) , were less likely to report the use of co-interventions ( relative risk -LSB- RR -RSB- @ , @ to @ , p = @ ) and were more likely to report that their foot pain had moderately or markedly improved during the study ( RR = @ , @ to @ , p < @ ; number needed to treat = @ , @ to @ ) .