Table 3: History of type 2 diabetes.

Diabetes duration (y)
N (%) 201 (100)
Missing (%) 0
Mean (SD) 3.1 (3.3)
Median 1.78
Q1; Q3 1.02; 4.38
Range 0.23-24.2
Duration of IR metformin treatment (months)
N (%) 201 (100)
Missing (%) 0
Mean (SD) 24.4 (27.9)
Median 12.0
Q1; Q3 6.0; 36.0
Range 2-180
Mean daily dose of immediate release metformin pre-study mg (SD)
N (%) 201 (100)
Missing (%) 0
Mean (SD) 1380 (432)
Median 1500
Q1; Q3 1000; 1700
Range 250-2000
BID dosing n (%) 196 (97.5)
TID dosing n (%) 5 (2.5)
Duration of metformin XR treatment at baseline (weeks)
N (%) 201 (100)
Missing (%) 0
Mean (SD) 21.3 (17.5)
Median 14.3
Q1; Q3 8.4; 30.4
Range 4-113.9
Current dose of metformin XR (mg)
N (%) 201 (100)
Missing (%) 0
Mean (SD) 1275 (447)
Median 1500
Q1; Q3 1000; 1500
Range 500-2250