Research Article

Time-Location Patterns of a Population Living in an Air Pollution Hotspot

Table 2

Time spent in microenvironments (hour) by subject type, season and day-type in the WFS and CDS neighborhoods.

MeanSDMed95th %MeanSDMed95th %MeanSDMed95th %MeanSDMed95th %

School Children( 𝑁 = 28)( 𝑁 = 25)( 𝑁 = 30)( 𝑁 = 29)
 Outdoors in the neighborhood4.23.53.610.
 Total in the neighborhood22.32.824.
 Total indoors18.33.918.
 Total outdoors5.33.75.711.
 Total in-vehicle(s)

Employed Adults( 𝑁 = 27)( 𝑁 = 27)( 𝑁 = 23)( 𝑁 = 21)
 Work/ S c h o o l ( a )
 Outdoors in the neighborhood3.04.31.910.
 Total in the neighborhood19.34.520.
 Total indoors18.14.718.524.
 Total outdoors4.
 Total in-vehicle(s)

Unemployed Adults( 𝑁 = 34)( 𝑁 = 32)( 𝑁 = 30)( 𝑁 = 29)
 Work/ S c h o o l ( b )
 Outdoors in the neighborhood3.
 Total in the neighborhood22.32.524.
 Total indoors18.83.718.924.
 Total outdoors4.73.74.610.
Total in-vehicle(s)

Note: SD: standard deviation; Med: median, 95th%: the 95th percentile.
( a ) T h e median of time spent at work by employed adults was zero on weekday in summer, because some subjects’ jobs were temporary or seasonal, for example, school teacher.
( b ) U n e m p l o y e d adults include college students. Unemployed adults may also work temporarily.