Table 2 Factors associated with concerns about extreme heat and heat-related injury, attitudes for more training and regulation: bivariate analysis (unadjusted) and multiple stepwise logistic regressions (adjusted)

 Female

1

1

1

1

1

 Male

1.04 (0.90–1.22)

1.01 (0.85–1.20)

1.01 (0.90–1.13)

2.94 (1.03–7.69)

1.09 (1.00–1.19)

  ≤ 24

1

1

1

1

1

 25–34

0.61 (0.28–0.93)

0.82 (0.72–0.94)

1.07 (0.92–1.23)

0.96 (0.87–1.05)

0.94 (0.88–1.02)

 35–54

0.40 (0.14–0.66)

0.83 (0.70–0.98)

1.12 (0.93–1.35)

0.92 (0.82–1.04)

0.91 (0.84–1.01)

 ≧55

0.31 (0.04–0.56)

0.53 (0.34–0.83)

0.98 (0.61–1.57)

1.00 (0.73–1.38)

0.90 (0.71–1.15)

 Primary or secondary school

1

1

1

1

 High school/vocational high school

0.82 (0.30–2.26)

0.91 (0.66–1.28)

0.93 (0.76–1.16)

0.87 (0.73–1.03)

 Training school

1.43 (0.26–8.26)

1.19 (0.89–1.60)

0.92 (0.77–1.11)

0.99 (0.85–1.15)

 Undergraduate college

1.47 (1.12–1.83)

1.25 (1.04–1.47)

0.93 (0.77–1.12)

0.99 (0.85–1.15)

 Postgraduate

1.85 (1.18–2.42)

1.83 (1.12–2.57)

1.15 (0.79–1.67)

1.18 (1.06–1.39)

 Completely indoors

1

1

1

1

 Mainly indoors

1.17 (0.99–1.40)

1.07 (0.89–1.30)

0.97 (0.86–1.09)

1.04 (0.94–1.15)

 Completely outdoors

1.41 (1.12–1.71)

1.11 (0.76–1.62)

0.96 (0.76–1.22)

0.94 (0.78–1.14)

 Mainly outdoors

1.13 (0.92–1.36)

1.05 (0.85–1.31)

0.97 (0.84–1.11)

1.03 (0.92–1.15)

 Not at all

1

1

1

1

1

 A little

1.25 (0.85–1.61)

1.89 (0.83–4.12)

1.16 (0.96–1.40)

1.06 (0.94–1.21)

1.01 (0.91–1.11)

 Moderately

1.44 (0.95–1.92)

1.92 (0.88–4.17)

1.10 (0.76–1.56)

1.05 (0.92–1.20)

0.94 (0.85–1.04)

 Very much

1.45 (1.11–1.79)

1.23 (1.04–1.43)

1.22 (1.01–1.47)

1.15 (0.90–1.45)

1.16 (1.05–1.29)

 No

1

1

1

1

1

 Yes

0.86 (0.64–1.15)

1.22 (1.03–1.41)

1.37 (1.04–1.85)

0.95 (0.77–1.17)

0.87 (0.74–1.02)

 No

1

1

1

1

1

 Yes

1.19 (1.09–1.29)

0.98 (0.85–1.13)

1.18 (1.03–1.35)

1.11 (1.02–1.20)

0.97 (0.90–1.04)

 No

1

1

1

1

 Yes

0.97 (0.80–1.19)

2.76 (1.19–6.43)

1.04 (0.90–1.20)

0.99 (0.89–1.11)

 No

1

1

1

1

1

1

 Yes

1.43 (1.05–1.78)

1.30 (1.03–1.62)

1.69 (1.25–2.13)

1.39 (1.08–1.77)

0.98 (0.84–1.15)

0.96 (0.85–1.09)

 No

1

1

1

1

1

1

 Yes

1.14 (1.03–1.26)

1.12 (1.02–1.27)

2.01 (1.16–3.49)

1.08 (1.01–1.16)

1.09 (1.00–1.20)

1.03 (0.96–1.11)

 No

1

1

1

1

1

1

 Yes

1.07 (0.94–1.22)

1.06 (0.92–1.23)

1.58 (1.21–1.95)

1.15 (1.04–1.26)

3.61 (1.19–9.98)

1.07 (1.00–1.15)

 No

1

1

1

1

1

 Yes

0.90 (0.79–1.05)

0.98 (0.84–1.15)

2.74 (1.11–6.79)

4.71 (2.26–9.93)

1.11 (1.02–1.20)

 No

1

1

1

1

 Yes

1.07 (1.03–1.13)

0.97 (0.84–1.13)

0.93 (0.84–1.03)

0.94 (0.87–1.02)

 No

1

1

1

1