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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)

From: Perceptions of workplace heat exposure and adaption behaviors among Chinese construction workers in the context of climate change

Independent variable

Concern for extreme heat

Concern for heat-related injury

Attitude for more training

Attitude for more regulation

Unadjusted OR(95%CI)

Adjusted OR(95%CI)

Unadjusted OR(95%CI)

Adjusted OR(95%CI)

Unadjusted OR(95%CI)

Adjusted OR(95%CI)

Unadjusted OR(95%CI)

Adjusted OR(95%CI)

Gender

 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)

Age group (years)

  ≤ 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)

 

Education level

 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)

 

Workplace environment

 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)

 

Physically demanding

 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)

 

Work close to heat sources

 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)

 

Use of personal protective equipment

 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)

 

Heat illness experience

 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)

 

Heat-related injury experience

 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)

 

Heat-related injury witnessed

 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)

 

Attending heat training

 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)

Knowing high temperature regulations

 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)

Adjusting work habits

 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)

 

High-temperature subsidies received

 No

1

 

1

 

1

 

1