Table 1 Changes of dietary measures in patients subjected to metformin or acarbose groups at baseline, 24 weeks and 48 weeks.

Dietary measures	Baseline	24-week treatment	48-week treatment	P value
Acarbose
Total fiber (g/d)	7.89 (5.33, 11.68)	7.46 (5.13, 10.94)	7.46 (5.38, 10.06)	0.319
Fruit fiber (g/d)	0 (0. 0.28)	0 (0, 0.73)	0 (0, 0.46)	0.423
Vegetable fiber (g/d)	2.27 (1.39, 4.03)	2.09 (1.23, 3.13)	2.09 (1.39, 3.48)	0.233
Legume fiber (g/d)	0 (0, 0.41)	0 (0, 0.55)	0 (0, 0.20)^b	0.001^c
Whole grain fiber (g/d)	0 (0, 0.80)	0 (0, 0.80)	0 (0, 0.44)	0.956
Carbohydrate-to-fiber ratio	28.41 (20.58, 37.67)	26.59 (18.00, 35.05)	30.20 (21.86, 37.56)^c	0.002^c
Metformin
Total fiber (g/d)	8.89 (5.89, 11.84)	8.14 (5.07, 12.20)	8.04 (5.55, 11.19)	0.619
Fruit fiber (g/d)	0 (0. 0.24)	0 (0, 0.91)	0 (0, 0.70)	0.013^c
Vegetable fiber (g/d)	2.36 (1.29, 4.18)	1.82 (1.21, 3.13)^b	2.30 (1.39, 3.48)^b	0.002^c
Legume fiber (g/d)	0 (0, 0.58)	0 (0, 0.40)	0 (0, 0.41)	0.133
Whole grain fiber (g/d)	0 (0, 0.50)	0 (0, 0)	0 (0, 0)	0.786
Carbohydrate-to-fiber ratio	26.29 (18.74, 34.33)	26.43 (18.18, 34.20)	29.16 (21.33, 35.76)^ab	0.003^c

Data presented as median and interquartile range were tested by Friedman’s two-way analysis of variance by ranks test during three time periods (baseline, 24 weeks, and 48 weeks) in two treatment groups.
^aSignificant difference from Baseline (adjusted P < 0.05)
^bSignificant difference from 24-week treatment (adjusted P < 0.05)
^cSignificant difference from baseline to 48-week treatment (P < 0.05)

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