In a randomized parallel group design substudy , 59 consenting participants recruited from primary care to a trial of acupuncture for IBS ( ISRCTN 08827905 ) were randomized to receive a one-question SMS message at either 9:30 am or at 6:30 pm for 7days : `` On a scale of 0-9 , with 0 being no symptoms and 9 being the worst symptoms you could have , how would you score your IBS symptoms now ?