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Table 1 Characteristics of the 23 included trials

From: How pragmatic are the randomised trials used in recommendations for control of glycosylated haemoglobin levels in type 2 diabetic patients in general practice: an application of the PRECIS II tool

CharacteristicsNumber of articlesMissing data
N (%)N (%)
Publication dateBefore 200914 (61)0
After 20099 (39) 
CountryaChina2 (9)1 (4)
US5 (22) 
UK4 (17) 
Denmark3 (13) 
Netherlands2 (9) 
Canada2 (9) 
Japan1 (4) 
New Zealand1 (4) 
Swiss2 (9) 
Finland/Norway1 (4) 
Greece2 (9) 
DesignTwo parallel groups19 (83)0
Three parallel groups3 (13) 
Double factorial design 2 × 21 (4) 
Sample size median (Q1; Q3)179 (82; 1068)0
Number of centresMonocentric studies10 (45)4 (17)
Pluricentric studies12 (55) 
Number of centres, median (Q1; Q3) 14 (1; 40) 
Follow-up in months, median (Q1; Q3)51 (6; 67)1 (4)
  1. aThe total number of countries cited exceeded the total number of trials as some trials were conducted in several countries