title: A survey of patient preferences for oral antihyperglycemic therapy in patients with type 2 diabetes mellitus.
abstract: BACKGROUND
  Previous research has demonstrated a correlation among patient preferences, dosing burden, and medication nonadherence, a well-recognized challenge in type 2 diabetes mellitus (T2DM). The objective of this study was to elicit preferences for alternative dosing regimens for oral antihyperglycemic therapies among patients with T2DM and to quantify differences in dosing preferences among patients with different characteristics.
  
  
  METHODS
  Preferences for dosing of oral antihyperglycemic drugs (OAD) were evaluated by surveying patients with T2DM in the United States (US). Survey participants were adult US patients with T2DM who were taking no or only 1 OAD and no injectable therapies. Each patient completed a web-enabled discrete-choice experiment (DCE) including a series of 8 pairs of hypothetical OAD profiles. Each profile was defined by reductions in average glucose, dosing schedule (e.g., once-weekly, once-daily, or twice-daily dosing), chance of mild-to-moderate gastrointestinal side effects, frequency of hypoglycemia, weight change, incremental risk of congestive heart failure, and cost. Each participant also answered a direct question about dosing preference. Random-parameters logit was used to analyze the DCE data. Prespecified subgroups were analyzed.
  
  
  RESULTS
  Of 2,262 patients invited to participate, 923 were included in the analysis (mean age 63 years, 45% male, 79% white). Reducing dosing frequency was statistically significantly important to patients; however, it was relatively less important than medication cost or clinical outcomes. On average, patients preferred once-weekly to once-daily dosing. Patients not currently taking an OAD had a stronger preference for once-weekly dosing than patients on treatment (P = 0.012). Patients younger than 45 years had a stronger preference for weekly dosing than older patients (P < 0.075).
  
  
  CONCLUSIONS
  For younger patients and patients not currently on treatment, once-weekly dosing may provide additional incentive to initiate and adhere to antihyperglycemic treatment; however, additional research will be required to confirm this hypothesis.
authors.affiliation: RTI Health Solutions, 200 Park Offices Drive, PO Box 12194, Research Triangle Park, NC, USA, abhauber@rti.org.
authors.forename: A Brett
authors.initials: AB
authors.lastname: Hauber
authors.forename: Kaan
authors.initials: K
authors.lastname: Tunceli
authors.forename: Jui-Chen
authors.initials: JC
authors.lastname: Yang
authors.forename: Ira
authors.initials: I
authors.lastname: Gantz
authors.forename: Kimberly G
authors.initials: KG
authors.lastname: Brodovicz
authors.forename: Charles M
authors.initials: CM
authors.lastname: Alexander
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Davies
authors.forename: Larry
authors.initials: L
authors.lastname: Radican