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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT00460018
Other study ID # CN-04AFerr-04-H
Secondary ID CN-03AFerr-02
Status Completed
Phase Phase 2
First received April 11, 2007
Last updated June 18, 2009
Start date September 2005

Study information

Verified date January 2009
Source Kaiser Permanente
Contact n/a
Is FDA regulated No
Health authority United States: Institutional Review Board
Study type Interventional

Clinical Trial Summary

The primary aim of this study is to evaluate whether a lifestyle intervention of diet, exercise, and breastfeeding is associated with decreased postpartum weight retention and reduced plasma glucose levels, measured at 6-weeks and 1-year postpartum, among women with gestational diabetes mellitus (GDM). Secondary outcomes are postpartum levels of plasma insulin, markers of insulin resistance, adiponectin, dietary fat, physical activity, and breastfeeding duration.


Description:

Postpartum predictors of type 2 diabetes incidence in women with GDM are pregnancy weight retention and postpartum weight gain. By promoting physical activity and appropriate diet during pregnancy and soon after delivery, and preventing excessive pregnancy weight gain and postpartum weight retention, the postpartum incidence of obesity and type 2 diabetes might be reduced or delayed in GDM women. We are implementing and evaluating a lifestyle intervention of diet, physical activity, and breastfeeding among women with GDM. The diet and physical activity elements of the intervention are similar to the DPP-Follow-up study. All participants have GDM by plasma glucose levels measured during a standard 100-g, 3-h OGTT according to the ADA and the ACOG criteria and have no contraindications to participating in a diet and physical activity program. At study entry, eligible women are randomly assigned to life-style intervention or usual medical care. The intervention starts during pregnancy and continues for one year postpartum. It consists of structured, individually tailored, in-person sessions and telephone calls with a lactation consultant and a life-style coach. The goals of the intervention during pregnancy are to help GDM women comply with the Institute of Medicine guidelines for weight gain by following the ADA and ACOG recommendations for physical activity and diet. After pregnancy, the goals of the intervention are to help women exclusively breastfeed for at least six months and reach their pre-pregnancy weight. For those women who were overweight or obese prior to pregnancy, the additional goal of a reduction in weight of at least 5% of their pre-pregnancy weight is also set. For the maintenance phase of the intervention, beginning at 8 months postpartum, the intervention women receive tailored written materials in the mail and telephone calls reinforcing the positive changes they have adopted. All participants have follow-up clinic visits at 8-week, 8-month, 12-month, 18-month, and 24-month after delivery. Data analyses will be by intent-to-treat. Demographics, psychosocial and behavioral factors that may be related to success at achieving the postpartum weight goals and the secondary postpartum outcomes will be examined.


Recruitment information / eligibility

Status Completed
Enrollment 180
Est. completion date
Est. primary completion date
Accepts healthy volunteers No
Gender Female
Age group 20 Years to 45 Years
Eligibility Inclusion Criteria:

- Diagnosis of Gestational Diabetes Mellitus

Exclusion Criteria:

- Ever diagnosed with diabetes when not pregnant

- Ever diagnosed with cardiovascular disease

- Ever diagnosed with lung disease

- Hemoglobin < 9.5 mg/dl

- Hematocrit less than 30%

- SBP >= 140 or DBP >= 90 in the last month

- Diagnosis of thyroid disease in the last month

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Prevention


Intervention

Behavioral:
Diet, Exercise, and Breastfeeding Intervention
Phase I (Pregnancy Program from GDM diagnosis to delivery): One in-person session with the lifestyle coach, two phone calls with the lifestyle coach, and one in-person session with the lactation consultant Phase II (Early Post-partum Period from delivery to 6 weeks post-partum): Two to four routine phone calls with the lactation consultant Phase III (Late Post-partum Period 6 weeks to 7 months postpartum): Two in-person sessions with the lifestyle coach, up to 11 phone calls with the lifestyle coach, and two to three routine calls with the lactation consultant Phase IV (Maintenance Phase 8 months to 1 year postpartum): One newsletter from the lifestyle coaches, two recipe letters and continue calls with the lifestyle coach (optional)

Locations

Country Name City State
United States Kaiser Permanente Division of Research Oakland California
United States Kaiser Permanente Oakland Oakland California
United States Kaiser Permanente San Francisco San Francisco California
United States Kaiser Permanente Santa Clara/Santa Teresa Santa Clara California
United States Kaiser Permanente Walnut Creek Walnut Creek California

Sponsors (1)

Lead Sponsor Collaborator
Kaiser Permanente

Country where clinical trial is conducted

United States, 

References & Publications (5)

Knowler WC, Barrett-Connor E, Fowler SE, Hamman RF, Lachin JM, Walker EA, Nathan DM; Diabetes Prevention Program Research Group. Reduction in the incidence of type 2 diabetes with lifestyle intervention or metformin. N Engl J Med. 2002 Feb 7;346(6):393-403. — View Citation

Leermakers EA, Anglin K, Wing RR. Reducing postpartum weight retention through a correspondence intervention. Int J Obes Relat Metab Disord. 1998 Nov;22(11):1103-9. — View Citation

Metzger BE. Summary and recommendations of the Third International Workshop-Conference on Gestational Diabetes Mellitus. Diabetes. 1991 Dec;40 Suppl 2:197-201. — View Citation

O'Toole ML, Sawicki MA, Artal R. Structured diet and physical activity prevent postpartum weight retention. J Womens Health (Larchmt). 2003 Dec;12(10):991-8. — View Citation

Tuomilehto J, Lindström J, Eriksson JG, Valle TT, Hämäläinen H, Ilanne-Parikka P, Keinänen-Kiukaanniemi S, Laakso M, Louheranta A, Rastas M, Salminen V, Uusitupa M; Finnish Diabetes Prevention Study Group. Prevention of type 2 diabetes mellitus by changes in lifestyle among subjects with impaired glucose tolerance. N Engl J Med. 2001 May 3;344(18):1343-50. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary Postpartum weight retention no more than 1.5 years No
Secondary reduced plasma glucose levels (measured at 6 weeks and 1 year postpartum) 1 year No
Secondary levels of plasma insulin 1 year No
Secondary markers of insulin resistance 1 year No
Secondary adiponectin 1 year No
Secondary dietary fat no more than 1.5 years No
Secondary physical activity no more than 1.5 years No
Secondary breastfeeding duration no more than 1.5 years No
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