Apparent temperature is defined as a person's perceived outdoor temperature in °C ([ 26, 27], and calculated using the following formula: −2.653 + (0.994 * air temperature) + (0.0153 * dew-point temperature)).
Two of the three nonsmokers who reported "no policy" and 63% of those who reported "indoor restricted area policy" were working at terminals with an official "outdoor only policy," and 24% of the nonsmokers who perceived "outdoor only policy" were in fact working at terminals where the official policy was "indoor restricted area policy".
Perceived outdoor barriers (POB) included streets in poor condition, terrain with slopes, long distances to services, and lack of resting places (benches).
Co-founder Mark Belinsky said that while people perceive outdoor air to be full of pollution like car exhaust, indoor air is usually less healthy.
Researchers at Columbia University found a high correlation between a participant's stance on global warming and how he perceived the outdoor temperature on the day he was asked about it.
Other weather conditions (including precipitation, humidity and wind speed), exposure times, cultural clothing, urban design, socio-demographic characteristics and individual traits combine to determine how people perceive their outdoor environment (Yahia & Johansson 2013; Stathopoulos et al. 2004).
Several studies have investigated the relationship between perceived and measured outdoor air quality provided by monitoring stations and whilst some studies found a significant association between the perception of air quality and specific air pollutants (Atari et al. 2009), others have found little or no association (Rotko et al. 2002).
In the initial phone interview, we studied perceived difficulties in outdoor mobility with the following response categories: 1) able without difficulty, 2) able with some difficulty, 3) able with a great deal of difficulty, 4) unable without the help of another person, and 5) unable to manage even with help.
Considering the relationship between physical function and perceived barriers in the outdoor environment [ 7, 12], improvements in functioning may also affect the perception of environmental barriers.
We asked participants what they perceived as a cold outdoor temperature in Queensland, and the median answer was 16°C, with a quarter of participants answering 14°C or less (table 1), and one participant answering that it never gets cold.
Gender, own area deprivation, self-report weekday outdoor play, perceived maternal limitation of sedentary behaviour and school-year group size remained associated with providing accelerometer data for the required number of days.
