Table 4: Results on Item Level

Table 4: Results on item level

item content (translated from German) / Loca-tiona / Thresholdsb / Fit Resid.c / DF / Chi
Squd / p / Analysis of applicability of items
1 / 2 / 3 / 4 / Overall
%f / physical workload (%)h / mental workload (%)h
rg / none / mod. / med. / high / rg / none / mod. / med. / high
impaired physical performance (low work load; ICF-Domain d4 mobility) / df=9
kneeling / -1.57 / -3.48 / -2.20 / -1.00 / .39 / 1.44 / 343.8 / 12.02 / .21 / 13.3 / ,17** / 26.7 / 16.0 / 8.4 / 10.5 / .0 / 8.7 / 13.5 / 14.6
(AN)enduring uncomfortable working positions / -1.56 / -4.68 / -2.54 / -.91 / 1.90 / -1.63 / 370.2 / 9.05 / .43 / 5.1 / .16** / 12.7 / 7.1 / 3.1 / 1.6 / 10.0 / 2.3 / 6.3 / 4.5
(AN)enduring monotonous physical work / -1.02 / -3.92 / -1.93 / -.32 / 2.09 / -1.61 / 359.3 / 11.20 / .26 / 7.8 / .26** / 26.8 / 6.6 / 3.0 / 2.5 / 14.3 / 4.7 / 8.9 / 7.5
being on foot several hours a day / -1.00 / -2.56 / -2.43 / -.55 / 1.55 / .89 / 358.4 / 2.43 / .98 / 7.8 / .29** / 24.4 / 11.8 / 3.0 / .8 / 14.3 / 2.3 / 11.5 / 5.5
standing (long time) / -.90 / -2.53 / -1.67 / -.31 / .90 / .87 / 364.7 / 2.45 / .98 / 6.8 / .14** / 18.1 / 6.0 / 3.1 / 5.9 / .0 / 8.5 / 8.4 / 5.1
climbing several flights of stairs / -.48 / -2.21 / -.97 / -.27 / 1.52 / .92 / 341.0 / 11.78 / .23 / 11.8 / 12.7 / 10.7 / 11.8 / 12.3 / 30.0 / 13.6 / 15.7 / 7.0
(AN)performing repetetive movements / -.39 / -2.55 / -1.57 / .22 / 2.33 / .87 / 363.8 / 8.07 / .53 / 8.5 / .24** / 22.5 / 12.8 / 5.7 / .8 / -.09* / .0 / .0 / 11.6 / 7.7
(DIF)carrying heavy objects 10 meter (men) / -.35 / -2.00 / -1.24 / .32 / 1.51 / -.27 / 178.7 / 11.64 / .23 / 5.6 / .15** / 12.2 / 7.9 / 3.6 / 2.5 / .0 / 2.3 / 7.3 / 5.0
(DIF)carrying heavy objects 10 meter (women) / -.78 / -2.41 / -1.38 / -.53 / 1.20 / 1.96 / 186.9 / 25.66 / .00
turning upper body backwards / -.32 / -2.43 / -1.15 / .08 / 2.21 / 1.43 / 377.5 / 11.82 / .22 / 3.8 / 5.2 / 4.0 / 3.0 / 4.0 / .0 / 9.3 / 5.8 / .5
stretching (to reach something) / -.23 / -2.24 / -.98 / .22 / 2.10 / -.36 / 358.4 / 12.13 / .21 / 6.3 / .10* / 10.8 / 8.6 / 3.9 / 5.3 / .0 / 10.9 / 8.0 / 3.8
carrying light objects several flights of stairs / -.18 / -2.01 / -.24 / .02 / 1.53 / .52 / 337.4 / 10.25 / .33 / 15.1 / 17.5 / 11.5 / 16.1 / 13.7 / 37.5 / 22.7 / 17.4 / 9.8
reaching the work place / .10 / -.30 / .67 / 1.31 / 2.30 / -.20 / 383.0 / 9.23 / .42 / 2.9 / 2.7 / 4.0 / 1.2 / 4.5 / .0 / 2.2 / 4.7 / 1.1
sitting (long time) / .25 / -1.34 / -.52 / .50 / 2.35 / 1.46 / 342.0 / 9.43 / .40 / 12.0 / -.19** / 1.3 / 6.0 / 13.2 / 20.2 / .10* / 25.0 / 21.3 / 13.1 / 7.8
operating pedals using legs/feet / .45 / -.95 / .22 / .69 / 1.82 / -.26 / 269.0 / 6.52 / .69 / 30.5 / .19** / 50.0 / 34.2 / 25.7 / 21.0 / 28.6 / 27.9 / 2.0 / 28.0
standing (short time) / .69 / -.98 / .10 / 1.23 / 2.39 / -.56 / 378.4 / 8.06 / .53 / 3.3 / 3.9 / 1.3 / 3.0 / 4.8 / 12.5 / 7.0 / 2.0 / 1.1
using hands to operate machines / .85 / -.46 / .31 / 1.11 / 2.44 / .68 / 303.7 / 8.09 / .53 / 28.0 / .16** / 35.1 / 26.2 / 19.5 / 12.4 / 37.5 / 23.4 / 2.0 / 20.7
(DIF)bending down to pick something light up (men) / .40 / -2.13 / -.36 / .53 / 3.57 / -1.53 / 182.4 / 10.21 / .33 / 1.4 / .0 / 2.5 / .7 / 2.3 / 12.5 / .0 / 2.0 / .5
(DIF)bending down to pick something light up (women) / .98 / -.87 / .03 / .61 / 4.16 / -.26 / 193.3 / 6.85 / .65
handling tasks which require attention to detaile / 1.37 / -.25 / 1.55 / 2.80 / 1.04 / 363.8 / 8.02 / .53 / 5.8 / 3.8 / 7.1 / 5.6 / 6.6 / .143** / 30.0 / 11.4 / 2.0 / 2.5
carrying light objects 10 meter / 1.40 / .20 / .84 / 1.75 / 2.81 / .73 / 373.0 / 9.04 / .43 / 4.9 / 6.7 / 5.3 / 4.8 / 3.8 / 16.7 / 8.7 / 2.0 / 3.4
sitting (short time) / 1.41 / .30 / .60 / 2.24 / 2.51 / -1.44 / 368.4 / 8.33 / .50 / 5.7 / * / 1.4 / 3.6 / 4.4 / 11.0 / 22.2 / 4.3 / 2.0 / 2.3
impaired physical performance (high work load ICF-Domain d4 ‘mobility’) / df=9
(DIF)dealing with physically exhausting tasks (long time, low physical work load) / -2.19 / -4.99 / -3.04 / -1.04 / .30 / -.94 / 79.0 / 5.15 / .82 / 5.1 / .42** / 12.7 / 7.1 / 3.1 / 1.6 / 10.0 / 2.3 / 6.3 / 4.5
(DIF)dealing with physically exhausting tasks (long time, high physical work load) / -1.41 / -4.01 / -2.95 / -.89 / 2.23 / -1.11 / 221.8 / 10.61 / .30
(AN)enduring uncomfortable working postions / -1.56 / -4.68 / -2.54 / -.91 / 1.90 / -1.47 / 341.0 / 3.03 / .96 / 15.1 / .16** / 12.7 / 7.1 / 3.1 / 1.6 / 2.3 / 6.3 / 4.5 / 5.2
carrying heavy objects 100 meter / -1.37 / -3.20 / -2.03 / -.96 / .72 / -1.33 / 323.4 / 19.7 / .02 / 10.5 / .15** / 46.8 / 25.0 / 5.0 / 2.3 / 12.5 / 4.3 / 12.6 / 20.7
(DIF)dealing with physically exhausting tasks (short time, low physical work load) / -1.28 / -3.09 / -2.27 / -1.30 / 1.53 / -1.88 / 89.9 / 6.12 / .73 / 6.3 / ,35** / 28,8 / 21,8 / 2,9 / 2,4 / .0 / 6,8 / 10,6 / 11,9
(DIF)dealing with physically exhausting tasks (short time, high physical work load) / -.66 / -2.62 / -1.39 / -.27 / 1.64 / .03 / 231.8 / 2.51 / .98 / 7.8 / .35** / 28.8 / 21.8 / 2.9 / 2.4 / .0 / 6.8 / 10.6 / 11.9
(AN)enduring monotonous physical work / -1.02 / -3.91 / -1.94 / -.31 / 2.09 / -1.21 / 329.3 / 19.65 / .02 / 9.5 / .26** / 26.8 / 6.6 / 3.0 / 2.5 / 14.3 / 4.7 / 8.9 / 7.5
lifting heavy objects above the height of head / -.89 / -2.89 / -1.61 / -.44 / 1.37 / -2.33 / 323.4 / 15.33 / .08 / 5.6 / .17** / 20.3 / 9.9 / 5.2 / 5.3 / .0 / 13.0 / 9.5 / 7.1
(DIF)carrying heavy objects 10 meter (women) / -.66 / -3.22 / -1.77 / -.32 / 2.69 / 1.16 / 173.0 / 6.28 / .71 / 5.6 / .15** / 12.2 / 7.9 / 3.6 / 2.5 / .0 / 2.3 / 7.3 / 5.0
(DIF)carrying heavy objects 10 meter (men) / -.20 / -2.19 / -1.32 / .42 / 2.29 / -.89 / 163.0 / 9.04 / .43
(DIF)turning upper body backwards (men) / -.44 / -3.16 / -1.51 / .19 / 2.73 / -.36 / 168.8 / 16.09 / .07 / 8.5 / 5.2 / 4.0 / 3.0 / 4.0 / .0 / 9.3 / 5.8 / .5
(DIF)turning upper body backwards (women) / -.01 / -2.22 / -.94 / .26 / 2.86 / .48 / 172.2 / 1.41 / .32
(AN)performing repetitive movements / -.39 / -2.55 / -1.57 / .22 / 2.33 / -.81 / 328.4 / 7.24 / .61 / 8.6 / .24** / 22.5 / 12.8 / 5.7 / .8 / -.09* / .0 / .0 / 11.6 / 7.7
Stretching to reach something on a rack / -.03 / -2.35 / -.97 / .43 / 2.77 / -.94 / 330.1 / 13.04 / .16 / 3.8 / .10* / 10.8 / 8.6 / 3.9 / 5.3 / .0 / 10.9 / 8.0 / 3.8
Deleted items due to non-fit to the Rasch model: working overhead (short time); working with tools; bending down to lift something heavy; standing several hours; walking longer distances (500 metres); carrying light objects (100 meter); reach workplace; carrying heavy objects (thress flights of stairs); working overhead (long time); sitting several hours
impaired productivity / df=7
same performance as before illness / -1.35 / -3.94 / -2.09 / -.52 / 1.16 / 2.01 / 333.1 / 11.81 / .11 / 2.7 / 2.6 / 5.3 / 2.4 / 1.6 / .0 / 2.3 / 3.4 / 2.2
completing usual tasks / -.71 / -3.63 / -1.57 / .12 / 2.26 / 1.55 / 342.9 / 3.29 / .86 / 1.1 / .0 / .0 / 1.2 / 2.3 / 16.7 / 2.2 / .9 / .6
showing best performance / -.66 / -3.32 / -1.09 / .02 / 1.75 / -.60 / 331.3 / 6.36 / .50 / 2.2 / 1.2 / 1.3 / 2.4 / 3.4 / .18** / .0 / 11.6 / 1.0 / 1.5
fulfilling ones own expectations / -.50 / -3.43 / -1.10 / .23 / 2.31 / -1.49 / 339.3 / 14.52 / .04 / .7 / .0 / .0 / 1.3 / .8 / .0 / 2.1 / .5 / .5
achieving success / -.33 / -2.39 / -.79 / .50 / 1.37 / 2.15 / 276.8 / 10.84 / .15 / 18.8 / -.11* / 15.2 / 10.7 / 22.4 / 22.1 / .23** / 70.0 / 36.4 / 18.8 / 12.6
performing ususal work load / .00 / -2.95 / -1.17 / .58 / 3.56 / -2.28 / 334.9 / 9.08 / .25 / 1.1 / .0 / .0 / .6 / 3.3 / 20.0 / .0 / .5 / 1.0
same performance as colleagues / .02 / -2.66 / -1.13 / .92 / 2.92 / .67 / 334.0 / 1.55 / .98 / 1.3 / .0 / 2.4 / 1.9 / .8 / 12.5 / 2.1 / 1.0 / 1.0
maintaining quality of work / .22 / -2.19 / -.98 / .81 / 3.25 / -.70 / 336.7 / 5.50 / .60 / .7 / .0 / 1.2 / .7 / .8 / .0 / .0 / 1.0 / .5
completing time-consuming tasks / .29 / -2.79 / -.72 / .83 / 3.82 / -1.04 / 337.6 / 11.84 / .11 / 3.2 / 2.5 / .0 / 3.4 / 4.0 / .14** / 25.0 / 6.8 / 2.4 / 1.5
fulfilling expectations of superiors / .29 / -2.03 / -.36 / 1.02 / 2.52 / .88 / 327.7 / 10.76 / .15 / 2.8 / -.11* / 2.5 / 5.1 / 5.2 / 4.0 / .23** / .0 / 2.3 / 3.9 / 5.7
completing difficult tasks / .29 / -2.54 / -1.14 / .66 / 4.17 / -.44 / 329.5 / 5.52 / .60 / 4.4 / 2.7 / 1.2 / 2.6 / 4.6 / .17** / 25.0 / 10.9 / 2.0 / 1.1
facing new challenges / .42 / -2.35 / -.47 / 1.29 / 3.22 / 1.03 / 317.0 / 3.90 / .79 / 7.5 / 9.3 / 5.3 / 8.4 / 6.8 / .23** / 50.0 / 21.7 / 5.6 / 5.1
adjusting to work requirements / .43 / -2.45 / -.39 / 1.26 / 3.31 / -.82 / 346.5 / 5.59 / .59 / .7 / 1.4 / .0 / .6 / .7 / .0 / 2.1 / .5 / .6
completing tasks on schedule / .70 / -1.95 / -.53 / 1.36 / 3.91 / .05 / 333.1 / 7.05 / .42 / 3.6 / 1.3 / 2.7 / 1.2 / 7.9 / .12** / 12.5 / 11.6 / 2.4 / 2.2
fulfilling expectations of colleagues / .88 / -1.91 / -.20 / 1.20 / 4.44 / -.42 / 312.6 / 4.32 / .74 / 6.3 / 3.7 / 10.5 / 4.2 / 8.4 / .12* / 42.9 / 9.3 / 5.2 / 5.5
Deleted items due to non-fit to the Rasch model: working without making mistakes; following security standards; sticking to usual pace of work; adjusting to work pace; completing work without additional breaks; sticking to time schedule; scheduling work; completing tasks without postponing; being on time; coping with awkward working hours; coping with overtime; fulfilling required working times; starting work without delay; completing work without it piling up
impaired coping with stress (ICF-domain d2 ‘general tasks and demands’) / df=9
finding time for leisure activities / -.87 / -2.57 / -1.29 / -.53 / .92 / .53 / 350.3 / 7.30 / .61 / 2.4 / 3.9 / 2.4 / 3.1 / .8 / .0 / 6.4 / 3.0 / 1.0
switching off after work / -.55 / -2.49 / -1.19 / -.06 / 1.55 / 2.06 / 360.0 / 5.00 / .83 / 1.1 / 1.3 / 1.3 / 1.2 / .8 / .0 / 2.2 / 1.4 / .6
compensating stress in leisure time / -.44 / -1.58 / -1.08 / -.31 / 1.22 / 1.40 / 337.9 / 8.79 / .46 / 3.8 / 2.5 / 4.8 / 5.6 / 1.6 / .0 / 9.1 / 4.7 / 2.0
taking actions to relieve stress / -.39 / -2.04 / -.61 / -.13 / 1.21 / .85 / 345.0 / 6.98 / .64 / 6.4 / 12.0 / 5.3 / 4.2 / 6.0 / .09* / 16.7 / 4.3 / 7.4 / 4.5
finding time for family / friends / -.13 / -2.25 / -.76 / .03 / 2.44 / .78 / 348.5 / 7.42 / .59 / 1.3 / 2.4 / .0 / 1.8 / .8 / .14** / .0 / 7.0 / 1.6 / .0
working without frustration / -.09 / -2.12 / -.93 / .45 / 2.23 / -.51 / 360.0 / 6.08 / .73 / .7 / 1.4 / 1.2 / .6 / .0 / 11.1 / .0 / .5 / .6
recovering on free days / -.01 / -1.42 / -.72 / .23 / 1.85 / -.65 / 355.6 / 12.40 / .19 / .9 / .0 / 1.2 / .6 / 1.6 / .0 / 2.1 / 1.0 / .5
keeping calm under stress / .12 / -2.25 / -.56 / .66 / 2.63 / -.58 / 360.9 / 8.24 / .51 / 1.1 / .0 / 1.2 / 1.9 / .7 / .09* / 11.1 / 4.3 / .5 / .0
coping with everyday stress at work / .14 / -2.08 / -.91 / .39 / 3.15 / -1.74 / 348.5 / 9.64 / .38 / .0 / 1.3 / 1.2 / .0 / 1.6 / .0 / 4.5 / 1.0 / .0
being aware of ones own limits / .17 / -1.19 / -.65 / .50 / 2.04 / .82 / 350.3 / 5.31 / .81 / 2.6 / 7.5 / 1.3 / 1.7 / 1.6 / .0 / 6.8 / 2.9 / 1.5
coping with stressful situations / .43 / -2.10 / -.43 / .31 / 3.96 / -.75 / 345.9 / 15.93 / .07 / 1.8 / 2.4 / 1.3 / 1.8 / 1.7 / .11* / 14.3 / 4.7 / 1.6 / 1.0
not losing motivation to work in stressful situations / .48 / -1.65 / -.46 / .66 / 3.36 / -.89 / 352.1 / 6.31 / .71 / .0 / .0 / .0 / .0 / .0 / - / .0 / .0 / .0 / .0
not loosing overview under stress / 1.15 / -1.26 / -.12 / 1.18 / 4.78 / -.40 / 352.1 / 2.47 / .98 / 1.1 / .0 / 2.5 / 1.3 / .8 / .15** / 12.5 / 4.3 / 1.0 / .0
Deleted items due to non-fit to the Rasch model: searching for help at times of too much stress; coping with time pressure; talking with superiors about measures of relieve; talking with family/friends about work stress
impaired cognitive performance (ICF-domains d1 ‘learning and applying knowledge’ and d2 ‘general tasks and demands’) / df=9
keeping track on multiple tasks simultaneously / -1.09 / -4.05 / -1.80 / -.39 / 1.88 / -1.61 / 267.9 / 10.60 / .31 / 2.0 / .0 / 1.2 / 2.5 / 3.1 / .14** / 25.0 / 4.3 / 1.5 / 1.0
reacting quickly / -1.04 / -4.16 / -1.74 / -.21 / 1.94 / .32 / 269.8 / 6.50 / .68 / .2 / .0 / .0 / .0 / .8 / -.02 / .0 / .0 / .5 / .0
concentrating on work / -1.04 / -4.51 / -2.21 / -.36 / 2.93 / -1.29 / 265.2 / 8.60 / .48 / .7 / 1.3 / .0 / .0 / 1.6 / .22** / .0 / 6.8 / .0 / .0
adjusting to new work demands / -.98 / -4.46 / -2.28 / -.66 / 3.47 / .47 / 280.7 / 3.70 / .93 / 1.1 / 1.4 / .0 / 1.9 / .7 / 11.1 / 2.1 / 1.4 / .0
coping with unexpected situations / -.89 / -4.42 / -1.92 / .40 / 2.39 / -1.27 / 275.2 / 18.50 / .03 / .9 / 1.3 / .0 / 1.3 / .8 / .18** / .0 / 6.4 / .0 / .5
working without forgetting things / -.84 / -4.55 / -1.98 / -.28 / 3.44 / .189 / 278.8 / 4.40 / .89 / .2 / .0 / .0 / .7 / .0 / .0 / .0 / .5 / .0
working thouroughly / -.74 / -3.38 / -1.70 / -.40 / 2.51 / 2.24 / 280.7 / 8.00 / .54 / .0 / .0 / .0 / .0 / .0 / .0 / .0 / .0 / .0
keeping track on work / -.55 / -4.24 / -1.10 / -.49 / 3.62 / -.04 / 267.9 / 8.60 / .47 / .7 / .0 / .0 / .6 / 1.6 / 12.5 / .0 / 1.0 / .0
working with high accuracy / -.55 / -3.64 / -1.48 / -.17 / 3.09 / .86 / 269.8 / 13.45 / .14 / .7 / .0 / .0 / 1.2 / .8 / .0 / 2.3 / 1.0 / .0
understanding complex instructions / -.52 / -3.84 / -1.54 / .14 / 3.14 / -.87 / 263.4 / 8.67 / .47 / 2.9 / 3.9 / 2.7 / 3.0 / 2.4 / .15** / 12.5 / 9.3 / 1.9 / 2.2
correcting ones own mistakes / .28 / -2.51 / -.32 / 1.54 / 2.42 / .33 / 258.9 / 4.30 / .89 / 2.7 / -.12* / .0 / .0 / 5.4 / 2.5 / .0 / 2.3 / 4.2 / 1.5
thinking clearly / .30 / -3.76 / -1.74 / .14 / 6.56 / .03 / 283.4 / 14.10 / .12 / .2 / .0 / .0 / .0 / .7 / .12* / 11.1 / .0 / .0 / .0
remembering necessary information / .31 / -4.18 / -1.47 / .36 / 6.52 / -.48 / 272.5 / 8.07 / .53 / .9 / .0 / .0 / .6 / 2.3 / .11* / 33.3 / .0 / .5 / .6
understanding written instructions / .75 / -2.94 / -1.08 / .63 / 6.39 / -.75 / 258.9 / 4.78 / .85 / 3.1 / 1.3 / 2.6 / 1.7 / 6.5 / .14** / 25.0 / 6.8 / 2.4 / 2.1
understanding oral instructions / 1.15 / -2.35 / -.42 / 1.17 / 6.17 / -.71 / 266.1 / 10.30 / .33 / .9 / 1.3 / 2.6 / .0 / .8 / .0 / .0 / 1.0 / 1.0
making decisions / 1.59 / -2.61 / -1.07 / 1.14 / 8.89 / -1.91 / 277.9 / 10.24 / .33 / 1.3 / .0 / 1.2 / 2.5 / .7 / .13** / .0 / 6.4 / 1.4 / .0
understanding easy instructions / 1.67 / -1.76 / -.36 / 2.05 / 6.76 / .80 / 274.3 / 14.19 / .12 / .4 / .0 / 1.2 / .6 / .0 / .0 / 2.1 / .0 / .5
recognizing ones own mistakes / 2.19 / -2.27 / -.05 / 2.30 / 8.80 / .67 / 280.7 / 7.60 / .58 / .9 / .0 / .0 / 1.9 / .7 / .0 / 2.1 / 1.4 / .0
Deleted items due to non-fit to the Rasch model: staying concentrated on work; reading attentively; staying concentrated despite diversions; keeping attention on work; taking responsibility; not being diverted by the pain; keeping the overview; proposing solutions and ideas; coping with unexpected difficulties

aLocation on the Rasch scale.It represents the difficulty of the item. The location is the mean of the thresholds of the item.

bThresholds mark the locations on the Rasch scale, where two adjacent answer options show equal probability.

cItem fit residual. It must be between -2.5 and 2.5 to show non-deviation from the model.

dChi-Square fit statistic must be non-significant to show non-deviation of the empirical data from model expectations for the item.

eonly the marked item of ‘impaired physical performance item bank’ - handling tasks which require attention to detail’ has been rescored to 01123 to ensure correct ordering of response categories.

foverall percentage of “does not apply” answer in the sample

gcorrelations between the occurrence of “does not apply” answers and the level of physical and mental workload (4-point Likert-Scales - none/moderate/medium/high), only significant correlations are shown

hpercentage of “does not apply” for different levels of physical and mental workload

* significant on 5%-Level, ** significant on 1%-Level

(DIF)Item are represented twice due to DIF.

(AN)Items are used for anchoring of the item banks ‘high physical workload’ and ‘low physical workload’.