Table 2.
Effect of the sodium bicarbonate intervention on acid-base indices
| Measurement | Serum Total CO2 (meq/L) | Urinary NH4+ (meq/d) | Urinary TA (meq/d) | Urinary pH | ||||
|---|---|---|---|---|---|---|---|---|
| Sodium Bicarbonate | Placebo | Sodium Bicarbonate | Placebo | Sodium Bicarbonate | Placebo | Sodium Bicarbonate | Placebo | |
| Within-group Δ from baseline | ||||||||
| At mo 3 | 1.3 (0.4 to 2.1) | 0.1 (−0.8 to 0.9) | −8 (−13 to −3) | −1 (−5 to 4) | −10 (−15 to −5) | 2 (−3 to 7) | 0.6 (0.5 to 0.8) | 0.0 (−0.2 to 0.1) |
| At mo 6 | 1.0 (0.3 to 1.8) | −0.2 (−0.9 to 0.6) | −5 (−11 to 1) | −1 (−7 to 5) | −11 (−16 to −5) | 0 (−5 to 6) | 0.7 (0.6 to 0.9) | 0.1 (−0.1 to 0.3) |
| Over mo 3 and 6 | 1.2 (0.5 to 1.9) | 0.0 (−0.7 to 0.7) | −6 (−11 to −2) | −1 (−6 to 3) | −10 (−15 to −6) | 1 (−4 to 6) | 0.7 (0.5 to 0.8) | 0.0 (−0.1 to 0.2) |
| Sodium Bicarbonate versus Placebo | Sodium Bicarbonate versus Placebo | Sodium Bicarbonate versus Placebo | Sodium Bicarbonate versus Placebo | |||||
| Difference in change from baseline | ||||||||
| At mo 3 | 1.2 (0.0 to 2.4) | −7 (−13 to −1) | −12 (−19 to −5) | 0.7 (0.5 to 0.8) | ||||
| At mo 6 | 1.2 (0.1 to 2.2) | −4 (−12 to 4) | −11 (−19 to −3) | 0.6 (0.4 to 0.8) | ||||
| Over mo 3 and 6 | 1.2 (0.3 to 2.1) | −5 (−11 to 0) | −11 (−18 to −5) | 0.6 (0.5 to 0.8) | ||||
Data are shown as mean (95% confidence intervals). Positive values for difference in change indicate that the change was greater in the sodium bicarbonate group. TA, titratable acid.