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Table 2 Vitamin C supplements over the course of the study in both treatment groups

From: The effect of increased frequency of hemodialysis on vitamin C concentrations: an ancillary study of the randomized Frequent Hemodialysis Network (FHN) daily trial

Period

Supplemental Vitamin C Intake

3×/week Treatment Group

6×/week Treatment Group

Total # Patients with Records For Period (Total # Records For Period)

# Patients with Records Matching Intake Criteria During Period (%)

# Records Matching Intake Criteria (%)

Total # Patients with Records For Period (Total # Records For Period)

# Patients with Records Matching Intake Criteria During Period (%)

# Records Matching Intake Criteria (%)

Randomization to Month 4

none

20 (24)

14 (70.0%)

14 (58.3%)

24 (26)

18 (75.0%)

18 (69.2%)

>0 to 100 mg

6 (30.0%)

10 (41.7%)

6 (25.0%)

8 (30.8%)

Month 4 to Month 8

none

18 (18)

13 (72.2%)

13 (72.2%)

22 (22)

16 (72.7%)

16 (72.7%)

>0 to 100 mg

5 (27.8%)

5 (27.8%)

6 (27.3%)

6 (27.3%)

Month 8 to Month 12

none

15 (15)

12 (80.0%)

12 (80.0%)

21 (21)

18 (85.7%)

18 (85.7%)

>0 to 100 mg

3 (20.0%)

3 (20.0%)

3 (14.3%)

3 (14.3%)