Table 3: Significant variables affecting safety compliance, safety participation, and total safety behavior based on hierarchical multiple regression analysis (n=661)
Characteristics	Step 1 †				Step 2 ††
Safety Compliance	B	SE	β		B	SE	β
Age (yrs)
<30 vs >40	0.24*	0.11	0.19*		0.08	0.10	0.06
30–40 vs >40	0.20*	0.10	0.15*		0.10	0.08	0.07
Sex (male vs female)	-0.45**	0.17	-0.15**		-0.28	0.10	-0.10
Smoking (yes vs no)	-0.03	0.06	-0.02		-0.04	0.05	-0.03
Educational level
Elementary vs University	-0.14	0.08	-0.08		-0.08	0.07	0-.04
Diploma vs University	-0.07	0.06	-0.05		-0.02	0.05	-0.01
Job tenure (yrs)
5–15 vs <5	-0.06	0.08	-0.05		0.003	0.07	0.02
>15 vs <5	-0.01	0.11	-0.01		0.04	0.10	0.02
Marital status (married vs single)	0.02	0.06	0.02		0.01	0.06	0.01
BMI (kg/m2)
25–30 vs <25	-0.10	0.05	-0.07		-0.06	0.05	-0.05
>30 vs <25	-0.01	0.11	-0.01		0.09	0.09	0.04
ESS (abnormal vs normal)					-0.33**	0.05	-0.37**
STOP-BANG (abnormal vs normal)					-0.51**	0.05	-0.23**
Adjusted R2	0.06**			0.30**
Safety Participation
Age (yrs)
<30 vs >40	0.27*	0.12	0.19*		0.17	0.12	0.11
30–40 vs >40	0.16	0.11	0.11		0.09	0.10	0.06
Sex (male vs female)	-0.32*	0.13	-0.10*		-0.22	0.13	-0.06
Smoking (yes vs no)	-0.09	0.06	-0.06		-0.10	0.06	-0.07
Educational level
Elementary vs University	0.05	0.09	0.03		0.09	0.08	0.04
Diploma vs University	0.02	0.07	0.01		0.05	0.06	0.03
Job tenure (yrs)
5–15 vs <5	0.09	0.08	0.07		0.11	0.08	0.10
>15 vs <5	0.08	0.12	0.05		0.11	0.12	0.07
Marital status (married vs single)	0.09	0.07	0.06		0.08	0.07	0.06
BMI (kg/m2)
25–30 vs <25	-0.05	0.06	-0.03		-0.03	0.06	-0.02
>30 vs <25	0.05	0.12	0.02		0.11	0.11	0.04
ESS (abnormal vs normal)					-0.22**	0.07	-0.14**
STOP-BANG (abnormal vs normal)					-0.31**	0.07	-0.21**
Adjusted R2	0.02*			0.01**
Safety Behavior total
Age (yrs)
<30 vs >40	0.26*	0.10	0.22*		0.11	0.09	0.09
30–40 vs >40	0.18*	0.09	0.15*		0.08	0.08	0.07
Sex (male vs female)	-0.38**	0.11	-0.14**		-0.25	0.09	-0.10
Smoking (yes vs no)	-0.06	0.05	-0.05		-0.07	0.05	-0.06
Educational level
Elementary vs University	-0.05	0.07	-0.03		0.01	0.05	0.01
Diploma vs University	-0.03	0.05	-0.02		-0.07	0.05	-0.06
Job tenure (yrs)
5–15 vs <5	0.02	0.07	0.01		0.08	0.06	0.07
>15 vs <5	0.03	0.10	0.02		0.07	0.09	0.05
Marital status (married vs single)	0.06	0.06	0.04		0.05	0.05	0.04
BMI (kg/m2)
25–30 vs <25	-0.07	0.05	-0.06		-0.05	0.04	-0.04
>30 vs <25	0.02	0.10	0.01		0.10	0.09	0.04
ESS (abnormal vs normal)					-0.27**	0.05	-0.21**
STOP-BANG (abnormal vs normal)					-0.41**	0.05	-0.33**
Adjusted R2	0.04**		0.25**
SE: Standard error: B, Unstandardized regression coefficient, β: Standardized regression coefficient *p<0.05, **p<0.01 †Corrected for age, sex, education level, smoking, and job tenure ‡Corrected for ESS and STOP-BANG level