Renal function
iGFR decreased in the HPD by 9.3 4.8 and increased by
2.4 3.9 ml/min/1.73 m2 in the SPD (p Z 0.34 for time
and p Z 0.38 between treatments). eGFR decreased in the
HPD from 98 to 97 ml/min/1.73 m2 while it decreased in
the SPD from 91 to 90 ml/min/1.73 m2 (p Z 0.6 for time
and p Z 0.9 for treatment). Albumin excretion rate
decreased in the HPD by 8.9 8.6 and increased by
1.6 13.7 mg/min in the SPD (p Z 0.82 for time and
p Z 0.13 between treatments). A decrease in hyperfiltration
in the group with eGFR > 120 ml/min (n Z 12)
of 15 ml/min (p Z 0.001) was seen. Participants with an
eGFR < 120 ml/min (n Z 33) improved their eGFR by
4 ml/min (p Z 0.03). This improvement was directly
related to weight loss (r Z 0.43, p Z 0.01) in this group
but not in the participants with hyperfiltration. Dietary
treatment group and protein intake were not related to
the change in eGFR. Baseline eGFR remained a predictor
of the change even after adjusting for weight loss
(p Z 0.001). The full report on renal function has been
published elsewhere [8].