Table 1.

Amounts (μmol/24 hours) of salicyluric (SU) and salicylic (SA) acid excreted in the urine of non-vegetarians (n=27), vegetarians (n=21), and patients taking aspirin (75 mg/day (n=15) and 150 mg/day (n=24))

			Patients taking aspirin
	Non-vegetarians	Vegetarians	75 mg	150 mg
SU (24 h)	3.91 (0.87–12.23)	11.01 (4.98–26.60)	170.69 (13.15–377.18)	165.17 (5.62–429.12)
SA (24 h)	0.31 (0.01–2.01)	1.19 (0.02–3.55)	0.41 (0.00–3.88)	0.36 (0.04–7.10)

The values shown are median (range). SU: vegetarians v non-vegetarians, p<0.001; difference between the medians, 6.07 μmol/24 hours; 95% confidence intervals (CI), 3.92 to 9.31. SA: vegetarians v non-vegetarians, p=0.0166; difference between the medians 0.63 μmol/24 hours; 95% CI, 0.06 to 1.38. SU: aspirin 75 mg v 150 mg, difference between the medians not significant (p=0.743). SA: vegetarians v aspirin 75 mg; difference between the medians not significant (p=0.157). SA: vegetarians v aspirin 150 mg; difference between the medians not significant (p=0.369).