STRIDE: a randomized trial of a lifestyle intervention to promote weight loss among individuals taking antipsychotic medications.
BACKGROUND
Individuals diagnosed with serious mental illnesses are at increased risk of obesity- and cardiovascular-related morbidity and early mortality. Lifestyle interventions aimed at weight loss, even those adapted to suit the needs of this particular subgroup, have rarely produced clinically meaningful reductions in weight.


METHODS
The STRIDE study is a multi-site, parallel, two-arm randomized controlled translational trial. Participants were recruited from community mental health clinics and an integrated not-for-profit health system. Participants were randomized either to usual care or to a 12-month intervention that consisted of: 1) weekly group participation for six months covering topics on nutrition, physical activity and lifestyle changes; 2) monthly group participation for an additional six month maintenance period; and 3) individual monthly contacts from intervention group facilitators during the second six month phase. All participants are assessed at baseline, 6, 12, and 24 months post-enrollment. Process and implementation evaluations are included and the study design includes a cost-utility analysis. Participants include 200 individuals with serious mental illness with an average age of 47.1 years, a mean body-mass index of 38.3 kg/m(2) and taking an average of 3.2 psychiatric medications at baseline. Baseline physiological measures included mean blood pressure (SBP/DBP) measurements of 119.2 (SD = 14.7)/79.4 (SD = 10.1); 35% reported a hypertension diagnosis and 11% took antihypertensive medications. Average lipid levels (mg/dL) were: a) triglycerides 188.0 (SD = 138.6), ranged from 43 to 1145; b) LDL 101.4 (SD = 32.9) and ranged from 17 to 185; c) HDL 45.8 (SD = 12.7) and ranged from 22 to 89; and d) total cholesterol 181.6 (SD = 39.7) and ranged from 50 to 324. Average fasting glucose levels were 108.9 (SD = 32.5) and ranged from 24 to 289. Average fasting insulin levels were 13.0 (SD=11.9) and ranged from 2 to 99.


CONCLUSIONS
The STRIDE study is based on a modified version of the PREMIER comprehensive lifestyle intervention, DASH diet arm. STRIDE has successfully enrolled 200 individuals with serious mental illness in community-based settings. Baseline characteristics present a population at high risk for obesity-related negative health outcomes and demonstrate the need for evidence-based interventions to reduce these risks.


BACKGROUND
Clinical Trials.gov NCT00790517.
Kaiser Permanente Center for Health Research, 3800 N, Interstate Avenue, Portland, OR 97227, USA. bobbijo.h.yarborough@kpchr.org.
Bobbi Jo H
BJ
Yarborough
Michael C
MC
Leo
Scott
S
Stumbo
Nancy A
NA
Perrin
Carla A
CA
Green
D000328:Adult; D014150:Antipsychotic Agents / Q000009:adverse effects* / Q000627:therapeutic use; D015992:Body Mass Index; D002985:Clinical Protocols; D005260:Female; D006801:Humans; D008019:Life Style; D008297:Male; D008875:Middle Aged; D050177:Overweight / Q000139:chemically induced / Q000628:therapy*; D011618:Psychotic Disorders / Q000188:drug therapy*; D012107:Research Design; D016896:Treatment Outcome; D015431:Weight Loss
D014150:Antipsychotic Agents