Compared with screen-detected cancers , interval cancers were diagnosed at more advanced stages ( @ -LSB- @ % -RSB- of @ interval cancers vs @ -LSB- @ % -RSB- of @ screen-detected cancers diagnosed in stage III or IV ; p < @ ) , were more often small-cell carcinomas ( seven -LSB- @ % -RSB- vs eight -LSB- @ % -RSB- ; p = @ ) and less often adenocarcinomas ( nine -LSB- @ % -RSB- vs @ -LSB- @ % -RSB- ; p = @ ) .