Table 2: Description of the main section of the IDEA questionnaire (items related to symptoms and health status) (n=499).

Symptoms Indicating Depression Symptoms Impacting the Work Performance Symptoms Causing Taken off Work Improvement Symptoms that Encourage you to Return to Work
Low mood or sadness 448 89.8% 450 90.2% 446 89.4% 431 86.4%
Concentration problems 328 65.7% 407 81.6% 398 79.8% 380 76.2%
Crying for no reason 354 70.9% 180 36.1% 221 44.3% 183 36.7%
Indecisiveness 240 48.1% 205 41.1% 168 33.7% 155 31.1%
Forgetfulness 250 50.1% 248 49.7% 198 39.7% 204 40.9%
Difficulty planning day to day activities 265 53.1% 217 43.5% 242 48.5% 214 42.9%
Changes in weight and appetite 308 61.7% 135 27.1% 107 21.4% 88 17.6%
Sleeping problems/insomnia 375 75.2% 372 74.5% 390 78.2% 344 68.9%
Loss of interest in daily activities 343 68.7% 287 57.5% 306 61.3% 192 38.5%
Other symptoms 20 4.0% 0 0.0% 0 0.0% 0 0.0%

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