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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: Int J Hyg Environ Health. 2017 Aug 14;220(8):1285–1294. doi: 10.1016/j.ijheh.2017.08.003

Table 2.

Number of hours (hrs) between pre-exposure urine sample (S1 at Time 1) and post-exposure urine sample (S2 at Time 2); and between pre-exposure urine sample (S1 at Time 1) and post-exposure urine sample (S3 at Time 3).

Time N Mean time (SD) Median time Min-Max
Post-exposure S2 at Time 2 12 1.2 hrs (0.42) 1.2 hrs 40 min – 1.9 hrs
Post-exposure S3 at Time 3 10 10.6 hrs (5.1) 8.6 hrs 6.0 hrs – 23 hrs