. 2015 Apr 3;15:329. doi: 10.1186/s12889-015-1681-x

Table 3.

Change in SMBQ score in relation to risk factor changes from 2004 to 2009

Risk factors	N	SMBQ change	P-value ^a
Job strain
Constantly not exposed^ref	522	−0.18
Job strain → not exposed	24	−0.02	0.55
Not exposed → job strain	32	−0.05	0.54
Constant job strain	8	0.60	0.01
Demands dimension
Constant middle-low demands^ref	330	−0.24
High demands → middle-low demands	68	−0.42	0.13
Middle-low demands → high demands	91	0.02	0.02
Constant high demands	107	0.14	<0.01
Control dimension
Constant middle-high control^ref	410	−0.16
Low control → middle-high control	57	−0.21	0.54
Middle-high control → low control	61	−0.03	0.36
Constant low control	70	−0.15	0.49
Risk of unemployment
Constant no risk^ref	505	−0.19
Risk → no risk	36	−0.37	0.26
No risk → risk	38	0.37	<0.001
Constant risk	22	0.11	0.17
New job possibilities
Constant higher chances^ref	241	−0.20
Lower chances → higher chances	51	−0.44	0.10
Higher chances → lower chances	108	0.02	0.08
Constant lower chances	198	−0.10	0.36
Self-perceived economic situation
Constantly satisfied^ref	335	−0.24
Dissatisfied → satisfied	71	−0.29	0.86
Satisfied → dissatisfied	121	0.14	<0.001
Constantly dissatisfied	92	−0.07	0.10

A negative SMBQ score change indicates reduced burnout level.

^aAdjustments for age, sex, socioeconomic index, and social integration.

^refThis category is considered the reference (unexposed) category in the analysis.

The overall mean SMBQ score change in the cohort was −0.15.

Unemployed persons were not included in analyses regarding job strain, demands, control or job insecurity (risk of unemployment, new job possibilities).