Adolescent 1 Adult 1 Aged 1 Colonoscopy 1 Female 1 Humans 1 Male 1 Middle Aged 1 Outpatients 1 Patient Acceptance of Health Care 1 Prospective Studies 1 Text Messaging 1 Urban Population 1 adherence 1 adolescent 1 adult 1 aged 1 article 1 bowel preparation clinical article 1 colonoscopy 1 comorbidity 1 controlled study 1 female 1 human 1 intestine preparation 1 male 1 middle aged 1 outpatient 1 patient attitude 1