Table 5

Factor loadings identified using principal component analysis and the orthogonal VARIMAX rotation *
Domain
 Abbreviated item description
 Factor1
 Factor2
Work Station
Office
equipment
 Computer position

My desk at work has suitable height
 0.54
 0.22

I have enough space to work at my office
 0.51
 0.42

I have a file holder I use when I am typing
 0.74
 0.04

My chair supports my lower back
 0.57
 0.30

Keyboard is placed directly in front
 0.42
 0.69

I sit straight in front of screen
 0.03
 0.68
Eigenvalue
1.72
 1.42
% of Variance
21.5
 17.9
Body Posture
Head and
body posture
 Awkward body
posture

I find my job physically exhausting
 0.98
 0.01

When I work my hand is placed in a straight line
 0.55
 0.01

When I work my head is bended
 0.98
 0.03

When I work my head is twisted towards the left or right
 0.98
 -0.01

When I work my body is twisted towards the left or right
 0.98
 -0.06

I sit in a symmetrical position
 0.97
 -0.04

I sit for long hours in one position
 -0.06
 0.87

For 2 hours per day I sit with lifted shoulders
 0.05
 0.88

During my work I sit in an awkward posture
 0.02
 0.98

My work requires performing repetitive tasks
 0.07
 0.92
Eigenvalue
7.10
 1.55
% of Variance
24.0%
 17.5%
Break Time
Autonomy
 Break quality

I can divide my work tasks
 0.67
 0.47

I find my work breaks sufficient
 0.68
 0.28

I can decide when to take a break
 0.77
 0.08

I can decide when to start and to stop
 0.78
 0.21

I alternate in my body position
 0.06
 0.59

I alternate in my job task
 0.41
 0.65

I perform job tasks without a computer
 0.53
 0.59

After 2 hours work I take a break for at least 10 minutes
 0.31
 0.51

My breaks are spent outside the office
 0.36
 0.79
Eigenvalue
3.41
 1.65
% of Variance
37.9%
 18.4%
Job Control
Skill discretion
 Decision authority

I participate with other colleges in decision making
 0.75
 0.64

I participate in implementation of job tasks
 0.75
 0.64

My work develops my abilities
 0.72
 0.67

In my work I have the chance to learn new things
 0.74
 0.65

I have to be creative in my work
 0.73
 0.66

I undertake different tasks in my work
 0.77
 0.62

I decide how to perform my job task
 0.66
 0.73

I determine the time & speed job tasks
 0.63
 0.76

I solve work problems by my self
 0.64
 0.75
Eigenvalue
8.83
 0.06
% of Variance
48.7
 12%
Job Demands
Time pressure
 Task complexity

I find trouble to finish my job tasks
 0.76
 0.21

I take regular over times
 0.80
 -0.02

I have limited time to finish my job
 0.74
 0.13

I work with max speed to finish my tasks
 -0.19
 0.59

I work under extensive work pressure
 0.14
 0.73

I find my work tasks difficult
 0.40
 0.62
Eigenvalue
2.36
 1.12
% of Variance
33.7
 16.1
Social Support
Social support
 Work flow

I find support from supervisors
 0.92
 0.33

I receive positive comments
 0.93
 0.33

My colleagues are helpful
 0.81
 0.26

My supervisors are helpful
 0.93
 0.33

I get personal advice from my colleagues
 0.92
 0.33

My supervisors are considerate
 0.81
 0.25

No contacts with other colleagues
 0.92
 0.32

The work flow goes smoothly
 0.47
 0.80

I can ask and enquire in my work
 0.47
 0.81

My work tasks depend on other colleagues
 0.18
 0.90

The work atmosphere is comfortable
 0.18
 0.90

I find support from colleages
 0.47
 0.81
Eigenvalue
8.96
 1.72
% of Variance
53.2%
 35.8%

Only items with a factor loading >0.5 on at least one factor are reported

Eltayeb et al. Environmental Health 2008 7:33   doi:10.1186/1476-069X-7-33