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. Author manuscript; available in PMC: 2019 Jan 1.

Published in final edited form as: Dev Psychobiol. 2017 Nov 20;60(1):118–122. doi: 10.1002/dev.21584

Table I.

Sample Collection Time Point Proportions

	Missing Tubes by Sample

	Sample 1 N (%)	Sample 2 N (%)	Sample 3 N (%)	Sample 4 N (%)	Sample 5 N (%)	P value
Tubes present	59 (92.2)	62 (96.9)	60 (93.8)	61 (95.3)	60 (93.8)	0.89
Tubes absent	5 (7.8)	2 (3.1)	4 (6.2)	3 (4.7)	4 (6.2)	0.89
Sufficient	57 (89.1)	58 (90.6)	58 (90.6)	58 (90.6)	55 (85.9)	0.93
Non-Sufficient	7(10.9)	6 (9.4)	6 (9.4)	6 (9.4)	9 (14.1)

Note: Proportion of saliva samples: present compared to those absent and sufficient compared to those not sufficient