StopAdvisor helped participants with low socioeconomic status stop smoking compared with the information-only website ( primary outcome : @ -LSB- @ % -RSB- of @ vs @ -LSB- @ % -RSB- of @ participants ; RR @ , @ % CI @-@ ; p = @ ; secondary outcome : @ -LSB- @ % -RSB- vs @ -LSB- @ % -RSB- participants ; @ , @-@ , p = @ ) , but did not improve cessation rates in those with high socioeconomic status ( @ -LSB- @ % -RSB- of @ vs @ -LSB- @ % -RSB- of @ participants ; @ , @-@ ; p = @ and @ -LSB- @ % -RSB- vs @ -LSB- @ % -RSB- participants ; @ , @-@ , p = @ , respectively ) .