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Table 1 Diabetes study characteristics

From: Assessing differential attrition in clinical trials: self-monitoring of oral anticoagulation and type II diabetes

Source Inclusion Criteria Duration of study mths. Nos. assigned to Intervention & (%) drop out Nos. assigned to Control & (%) drop out Intervention for self-monitoring group Control group intervention
19 Wing 1986, US NIDDM, ≥ 20% above ideal weight. Use oral hypoglycaemic medication or insulin. 14 25 (8.0) 25 (12.0) Taught to make changes in diet and exercise if SMBG elevated. Standard behavioural weight control treatment
14 Fontbonne 1989, France NIDDM, no rapidly progressing diabetic complications and no severe illness. 6 68 (17.6) 68 (20.6) All patients had pre entry visit, and training in SMBG. Usual diabetic clinic care
11 Allen 1990, US NIDDM, No prior experience of monitoring 6 31 (12.9) 30 (10.0) Diet and exercise counselling. Individual instruction for SMBG Diet and exercise counselling. Individual instruction for SMUG
13 Estey 1990, Canada NIDDM On diet or oral hypoglycaemic drugs. 3 30(6.7) 30 (16.7) 3 day education program (test and control). Inc. nurse, dietician, social worker and pharmacist. Same 3-day education programme
5 Rutten 1990, Holland Treated for NIDDM for least 6 months. Not taking insulin. Not under treatment for other conditions. 12 66 (50) 83 (12.0) Given instruction on SMBG on 2–5 occasions. Given advice and therapeutic goals. Usual General Practice care
15 Gallichan 1994, UK NIDDM, on oral hypoglycaemic agents. 6 15 (33.3) 12 (16.7) Instruction on SMBG. Instruction on SMUG
19 Muchmore 1994, US NIDDM treated with diet alone/diet + oral sulfonylurea hypoglycemic agents. No use of self monitoring for 3 months. 7 15 (20.0) 14 (21.4) Training in SMBG from nurse educator individually and in groups General strategies of diabetes control, exercise, recommended by ADA.
17 Miles 1997, UK Newly diagnosed NIDDM 6 68 (18) 23 (28.0) Group education, within a week of diagnosis. 4 education sessions supervised by nurse. Individual SMBG techniques checked at 1 month. Group education, within a week of diagnosis. 4 education sessions supervised by nurse. Individual SMUG technique checked at 1 month.
18 Schwedes 2002, Germany NIDDM, BMI > 25 kg/m2. Treated with diet or diet in combination with sulfonylureas or metformin. 6 125 (9.6) 125 (12.0) Standardized counselling and instruction on use of SMBG None standardised counselling on diet and lifestyle.
4 Guerci 2003, France NIDDM, no prior experience of monitoring and able to carry out self monitoring. 6 345 (47.5) 344 (40.4) Training in SMBG by GP Usual General Practice care
12 Davidson 2005, US NIDDM, on entering Diabetes Managed Care Program. 6 43 (2.3) 45 (0) Training in SMBG by specialist nurse Diabetes Managed Care Program.
  1. SMBG self-monitoring of blood glucose
  2. SMUG self-monitoring of urine glucose