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. 2015 Aug 26;145(10):2245–2252. doi: 10.3945/jn.115.216739

TABLE 2.

Baseline and week 12 geometric means and percentage change in the geometric mean from baseline by treatment group for outcomes measured in Bangladeshi adults participating in a folic acid and creatine randomized, controlled trial1

Placebo Cr P(Cr vs. placebo)2 FA Cr+FA P(Cr+FA vs. FA)2
Plasma Cr+Crn n = 101 n = 101 n = 130 n = 102
 Baseline mean (95% CI) 78 (74, 83) 74 (70, 79) 0.21 77 (73, 82) 77 (72, 82) 0.91
 Week 12 mean (95% CI) 76 (72, 80) 123 (113, 133) <0.0001 78 (74, 82) 124 (115, 132) <0.0001
 % change (95% CI) −2.7 (−6.9, 1.7) 65.5 (51.1, 81.2) <0.0001 1.2 (−4.1, 6.7) 60.9 (49.8, 72.8) <0.0001
Plasma GAA n = 101 n = 101 n = 130 n = 102
 Baseline mean (95% CI) 1.9 (1.8, 2.1) 1.9 (1.8, 2.0) 0.38 1.8 (1.7, 1.9) 1.9 (1.8, 2.0) 0.28
 Week 12 mean (95% CI) 2.0 (1.9, 2.1) 1.7 (1.6, 1.8) <0.0001 1.9 (1.8, 2.0) 1.7 (1.6, 1.8) 0.01
 % change (95% CI) 3.7 (−0.8, 8.5) −10.6 (−15.9, −4.9) 0.0002 7.0 (2.0, 12.2) −9.0 (−14.2, −3.4) <0.0001
Blood SAM n = 76 n = 89 n = 139 n = 94
 Baseline mean (95% CI) 2.1 (2.0, 2.3) 2.0 (1.9, 2.1) 0.19 2.1 (2.0, 2.2) 2.0 (1.9, 2.1) 0.15
 Week 12 mean (95% CI) 2.1 (2.0, 2.3) 2.1 (1.9, 2.2) 0.66 2.1 (2.0, 2.2) 2.0 (1.9, 2.1) 0.11
 % change (95% CI) −0.8 (−5.9, 4.5) 3.1 (−2.8, 9.5) 0.33 1.1 (−3.3, 5.6) 0.6 (−4.5, 6.0) 0.90
Blood SAH n = 68 n = 86 n = 127 n = 84
 Baseline mean (95% CI) 0.21 (0.19, 0.24) 0.22 (0.19, 0.25) 0.84 0.21 (0.19, 0.23) 0.22 (0.19, 0.25) 0.43
 Week 12 mean (95% CI) 0.21 (0.18, 0.24) 0.22 (0.20, 0.25) 0.42 0.22 (0.20, 0.24) 0.24 (0.22, 0.27) 0.17
 % change (95% CI) −2.1 (−13.6, 10.9) 3.5 (−10.6, 19.7) 0.57 4.7 (−5.1, 15.5) 8.9 (-5.0, 24.9) 0.64
Plasma tHcys n = 101 n = 101 n = 153 n = 103
 Baseline mean (95% CI) 12.2 (11.2, 13.4) 11.4 (10.5, 12.3) 0.24 11.9 (11.1, 12.9) 11.8 (10.9, 12.7) 0.82
 Week 12 mean (95% CI) 12.1 (11.1, 13.1) 10.9 (10.1, 11.7) 0.07 9.1 (8.7, 9.6) 9.3 (8.8, 9.8) 0.60
 % change (95% CI) −1.3 (−5.4, 3.1) −4.3 (−9.0, 0.7) 0.35 −23.4 (−27.1, −19.5) −21.0 (−25.2, −16.4) 0.41
Plasma tCys n = 101 n = 101 n = 153 n = 103
 Baseline mean (95% CI) 218 (210, 226) 215 (207, 224) 0.63 216 (210, 223) 213 (204, 222) 0.56
 Week 12 mean (95% CI) 222 (215, 230) 227 (219, 236) 0.40 223 (217, 229) 224 (216, 232) 0.87
 % change (95% CI) 2.1 (−0.4, 4.7) 5.7 (2.6, 9.0) 0.08 3.2 (1.1, 5.4) 5.2 (2.5, 8.0) 0.26
1

All geometric mean units are μmol/L. Percentage change defined as (geometric mean ratio – 1) × 100. Cr, 3 g/d creatine group; Cr+Crn, creatine plus creatinine; Cr+FA, 3 g/d creatine plus 400 μg/d folic acid group; FA, 400 μg/d folic acid group; GAA, guanidinoacetate; SAH, s-adenosylhomocysteine; SAM, s-adenosylmethionine; tCys, total cysteine; tHcys, total homocysteine.

2

From 2-sample t tests comparing ln-transformed outcomes or within-person change in ln-transformed outcomes between the placebo and Cr groups, or between the FA and Cr+FA groups.