Table 1.

Results of different experiments on the effect of oxaloacetate on lifespan^†

Strain	Median lifespan (days ± SEM)		Difference (%)	n	P-value‡	Max lifespan (days ± SEM)		Difference (%)
	Crtl	Exptl				Crtl	Exptl
N2 control	14.4 ± 0.9	18.0 ± 2.0	+25	5	≪ 0.001	23.6 ± 3.2	26.4 ± 3.2	+13
N2 control§	12.5 ± 0.7	14.4 ± 1.1	+15	3	< 0.05	29.0 ± 1.0	31.5 ± 0.5	+5
SIR-2.1 mutant	13.9 ± 3.6	16.2 ± 4.0	+16	2	< 0.01	19.5 ± 4.5	25.0 ± 7.0	+27
DAF-16 mutant	15.0 ± 0.3	13.4 ± 1.0	−11	3	< 0.05	22.0 ± 3.0	22.5 ± 2.5	+3
AAK-2 mutant	11.9 ± 0.2	12.1 ± 0.3	+1	3	1.00	16.7 ± 0.7	14.7 ± 0.3	−5

^†Comparisons were made between groups treated with 0 (Crtl) or 8 mm (Exptl) oxaloacetate.

^‡Probability (P-value) of no significant difference in median lifespan between control and experimental groups; the P-value given is the higher one of that determined by a single anova test or by Fisher's combined probability test of log rank data.

^§Dead bacteria were used instead of live bacteria. n, number of repeats for a given experiment.