NCT00416078.

Methods	Randomised trial
Participants	Caregivers of people with Alzheimer's disease
Interventions	Title of the intervention: Customary care and monthly brief telephone calls Aim: Not stated Interventionist(s): Project staff Duration: Six months Content: Caregiver brief supportive telephone calls for 6 months embedded in one year of customary care Standardisation: No detail provided Comparison group: Customary care and access to an intensive, interactive online education and support website
Outcomes	1. Burden: Zarit Short Burden Scale, a 12‐item instrument that utilises a Likert scale 1‐5 rating of frequency (range 12 (never) to 60 (nearly always)), higher scores were more indicative of caregiver burden. 2. Depression: Beck Depression Inventory. The Beck Depression Inventory is a 21‐item Likert scale instrument with a total range of 0 to 63. Higher scores indicated increased endorsement of depressive symptoms. 3. Frequency of Patient Problematic Behavior: Frequency of Problematic Behaviors on the Revised Memory and Behavior Problem Checklist (a 24‐item instrument that measures the frequency of a behaviour on a 0‐4 Likert scale (range 0‐96, higher numbers indicated greater frequency of problematic behaviour). 4. Caregiver Negative Reactions to Problematic Behavioural Patterns: Negative Reactions Scale from the Revised Memory and Behavior Problem Checklist. The scale measures the caregiver's level of reaction to a series of potential problematic behaviours on a 0‐4 Likert scale; higher numbers indicated a greater degree of distress. The range is 0‐96. Data were collected at 6 months (end of intervention).
Notes	This study is complete and to be evaluated for inclusion in the next update of this review. Unclear as to what 'customary care' refers to. Not stated if project staff were health care professionals. More detail is required on the telephone arm, which is the comparator arm of this study.