Skip to main content
. Author manuscript; available in PMC: 2009 Feb 1.
Published in final edited form as: J Expo Sci Environ Epidemiol. 2008 Jul 30;19(2):223–234. doi: 10.1038/jes.2008.44

Table 3.

Number of infants with single or multiple visits by biological matrix.

Number of visits per child Urine Saliva Blood
One 66 59 61
Two 28 22 7
Three 25 28 3
Four 46 43 1
Total Infants 165 152 72
Total Visits* 381 359 88
*

Each child had one sample (aliquot) from each matrix analyzed on each visit except for saliva where two aliquots of two saliva samples were analyzed bringing the total to 361.