Personal ultraviolet Radiation exposure in a cohort of Chinese mother and child pairs: the Chinese families and children study

Table 3 Environmental characteristics of the study locations, Chinese Families and Children Study, 2012

	Urban	Rural
Latitude	31.3° N	39.3° N
Average ambient solar UVR (MED^a, April–June)	20.53	20.24
Average humidity^b
April	75%	58%
May	74%	63%
June	82%	73%
Average (daily mean) temperature (April–June)
April	14.8°C	11.5°C
May	20.4°C	17.3°C
June	23.8°C	22.0°C

^aMinimal Erythemal Dose
^bAverage data for the period 1971–2000, China Meteorological Data Service Center, http://data.cma.cn/en [40]

ISSN: 1471-2458