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. 2013 Jul 18;3(7):e002791. doi: 10.1136/bmjopen-2013-002791

Table 5.

Standardised correlation coefficients (β) for control sociodemographic variables, personality and occupational stress variables as predictors of MBI—professional exhaustion, depersonalisation and personal accomplishment scores

Predictor Model 1 Model 2 Model 3 Model 4 Model 5
Professional exhaustion
Control variables
 Length of employment (years) 0.13* 0.09 0.10 0.12* 0.14**
 Rank −0.20*** −0.20*** −0.20*** −0.14** −0.14*
 Education 0.06 0.07 0.07 0.05 0.06
 Origin −0.02 −0.02 −0.04 −0.02 −0.03
 Marital status −0.05 −0.05 −0.03 −0.04 −0.01
 Barracked −0.05 −0.08 −0.07 −0.04 −0.03
 Children −0.09 −0.09 −0.09 −0.08 −0.08
Personality variables
 BFQ energy/extraversion −0.10 −0.09 −0.09 −0.09
 BFQ friendliness/agreeableness −0.08 −0.08 −0.09 −0.09
 BFQ conscientiousness −0.04 −0.04 −0.04 −0.04
 BFQ emotional stability −0.23*** −0.22*** −0.21*** −0.21***
 BFQ openness 0.04 0.03 0.03 0.03
Occupational stress variables
 DCS Demand 0.12* 0.12*
 DCS Control −0.07 −0.09
 DCS Support −0.09 −0.08
 ERI Effort 0.21*** 0.21***
 ERI Reward −0.16** −0.16**
 ERI overcommitment 0.27*** 0.27***
 Adjusted R2 0.05** 0.11*** 0.13*** 0.24*** 0.26***
Depersonalisation
Control variables
 Length of employment (years) 0.08 0.03 0.05 0.06 0.09
 Rank −0.08 −0.06 −0.06 −0.02 −0.01
 Education 0.00 0.00 0.01 0.00 0.02
 Origin −0.02 −0.04 −0.06 −0.03 −0.05
 Marital status −0.09 −0.06 −0.04 −0.05 −0.03
 Barracked −0.05 −0.07 −0.06 −0.04 −0.03
 Children −0.18** −0.16** −0.16** −0.15** −0.14**
Personality variables
 BFQ energy/extraversion 0.08 0.08 0.08 0.09
 BFQ friendliness/agreeableness −0.23*** −0.24*** −0.24*** −0.24***
 BFQ conscientiousness −0.02 −0.02 −0.02 −0.03
 BFQ emotional stability −0.24*** −0.24*** −0.23*** −0.23***
 BFQ openness −0.02 −0.02 −0.02 −0.02
Occupational stress variables
 DCS Demand 0.03 0.03
 DCS Control −0.09 −0.12*
 DCS Support −0.17** −0.17***
 ERI Effort 0.16** 0.16**
 ERI Reward −0.23*** −0.24***
 ERI overcommitment 0.14** 0.14**
 Adjusted R2 0.03* 0.14*** 0.17*** 0.23*** 0.26***
Personal accomplishment
Control variables
 Length of employment (years) 0.06 0.09 0.05 0.08 0.03
 Rank 0.01 −0.02 −0.05 −0.05 −0.08
 Education 0.01 0.03 −0.01 0.04 0.00
 Origin 0.09 0.08 0.09 0.08 0.09
 Marital status 0.11 0.06 0.04 0.06 0.03
 Barracked −0.09 −0.06 −0.10 −0.07 −0.11*
 Children 0.05 0.03 0.01 0.03 0.00
Personality variables
 BFQ energy/extraversion 0.15** 0.14** 0.15** 0.14**
 BFQ friendliness/agreeableness 0.26*** 0.27*** 0.26*** 0.27***
 BFQ conscientiousness 0.23*** 0.24*** 0.23*** 0.24***
 BFQ emotional stability 0.18*** 0.17** 0.18** 0.16**
 BFQ openness 0.17** 0.16** 0.17** 0.16**
Occupational stress variables
 DCS Demand −0.02 −0.02
 DCS Control 0.19*** 0.20***
 DCS Support 0.03 0.02
 ERI Effort −0.08 −0.09
 ERI Reward 0.06 0.07
 ERI overcommitment −0.09 −0.10
 Adjusted R2 0.01 0.20*** 0.23*** 0.21*** 0.24***

n=289.

*p<0.05.

**p<0.01.

***p<0.001.

Barracked, no=0, yes=1; BFQ, Big Five Questionnaire38 39; children, no=0, yes=1; DCS, Demand–Control–Support Questionnaire16 40; education, high school or higher=0, lower than high school=1; ERI, Effort–Reward–Imbalance Questionnaire17 40; marital status, single or divorced=0, married or cohabiting=1; MBI, Maslach Burnout Inventory50 51; origin, Northern Italy=0, Southern Italy=1; rank, agent (‘agent’ or ‘first class agent’)=0, other=1.