Table 3.

Factors related to RTW-ES: multilevel logistic regression analyses, taking assessor into account

Variable (reference group)	Crude odds ratios		OR, adjusted for age, gender, and educationª
	OR (95%)	P	OR (95%)	P
Personal factors
Age (years)	1.00 (0.97–1.03)	0.93	0.99 (0.95–1.03)	0.65
Gender (female)	1.07 (0.68–1.71)	0.76	0.97 (0.51–1.85)	0.92
Education (low)	1.02 (0.43–2.41)	0.97	1.08 (0.35–3.32)	0.89
Reason of absence (mental)¹	1.97 (1.14–3.42)	0.02	1.22 (0.57–2.61)	0.60
Tenure (years)	1.03 (0.99–1.06)	0.14	1.03 (0.98–1.01)	0.23
Periods of complete disability (no)	1.19 (0.75–1.89)	0.45	–	–
Periods of work resumption (no)	1.22 (0.76–1.95)	0.42	–	–
External factors
Sickness absence work related (yes)²	2.73 (1.33–5.62)	0.01	1.44 (0.64–3.22)	0.38
Relationship employer/employee (poor)	5.91 (2.81–12.43)	<0.01	5.47 (2.00–14.98)	<0.01
Conflict (yes)³	4.25 (2.14–8.43)	<0.01	–

OR of >1 indicates a higher chance of RTW-ES, compared to the reference group

ª QIC = 265.92, N = 269

¹Physical, both physical and mental, mental

²No, partial/yes

³r = 0.72 with variable ‘relationship employer/employee’; not included in multiple regression