Coffee Consumption and Cystatin-C-Based Estimated Glomerular Filtration Rates in Healthy Young Adults: Results of a Clinical Trial

Table 3

Difference in cystatin-C-based eGFR (determined using five different equations) between the start and end of each consumption period.

Cystatin-C-based eGFR		Coffee				Green tea
(mL/min/1.73 m^2)		Baseline	End of consumption	P value	Change; (95% CI)	Baseline	End of consumption	P value	Change; (95% CI)
Tan et al. [18]	PETIA	101 ± 15.8^†	106 ± 14.4	.01	5.1 (1.3–8.9)^†	105 ± 17.1	106 ± 17.9	.51	1.1 (−2.4–4.6)
Grubb et al. [19]	PETIA	128 ± 27.0^†	137 ± 21.6	.02	9.9 (1.8–18.0)	137 ± 28.6	139 ± 31.3	.50	2.4 (−5.0–9.9)
Sjöström et al. [20]	PETIA	131 ±22.5^†	138 ± 20.4	.01	7.2 (1.8–12.7)^†	137 ± 24.4	139 ± 25.5	.51	1.6 (−3.4–6.5)
Larsson et al. [21]	PETIA	140 ± 33.1^†	150 ± 30.2	.02	10.3 (1.8–18.8)^†	150 ± 36.0	152 ± 38.3	.50	2.4 (−5.1–10.0)
Hoek et al. [22]	PENIA	94.9 ± 14.6^†	99.5 ± 13.2	.01	4.7 (1.1–8.2)^†	99.2 ± 15.8	100 ± 16.5	.51	1.0 (−2.1–4.2)

P values were determined by repeated-measure ANOVA. ^†𝑃<.05 versus green tea (paired t test).