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. 2006 Feb 28;6:50. doi: 10.1186/1471-2458-6-50

Table 3.

Personal, indoor and outdoor concentrations of xylene ( μg/m³) in the six periods

	Personal			Indoor			Urban
Period	Mean	Median	10^th–90^thpercentiles	Mean	Median	10^th–90^thpercentiles	Mean	Median	min–max

1^st– SEP	89.4	84.6	53.5–141.9	49.6	48.4	20.3–79.6	101.5	88.3	41.4–263.0
2^nd– DEC	75.9	71.6	49.1–113.8	56.4	39.7	22.1–117.0	85.6	74.6	28.0–180.5
3^rd– FEB	74.5	63.8	39.7–141.3	42.7	39.2	16.9–67.9	85.6	75.8	41.2–197.9
4^th– APR	83.1	63.2	30.7–147.7	45.7	37.1	18.7–92.9	71.5	63.0	23.2–167.4
5^th– JUN	60.7	56.0	26.6–97.5	32.3	27.4	16.2–49.4	64.0	53.3	21.1–160.9
6^th– SEP	75.5	63.9	38.2–122.8	36.5	31.9	20.9–51.5	88.8	76.4	35.4–229.2
Annual	76.6	67.4	37.8–123.3	43.7	36.2	19.5–72.9	82.8	72.3	21.1–263.0