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. 2021 Sep 15;11:18375. doi: 10.1038/s41598-021-96731-8

Table 3.

Description of the dataframe used for the machine learning approaches.

Meaning Scaling Implementation Count Mean Std
Question1 Did you perceive the tinnitus right now? Binary YesNoSwitch 80,969 0.76 0.43
Question2 How loud is the tinnitus right now? Continuous Slider in range (0,1) 80,969 0.46 0.3
Question3 How stressful is the tinnitus right now? Continuous Slider in range (0,1) 80,969 0.36 0.28
Question4 How is your mood right now? Discrete SAM from 0 to 1 with step size 0.125 80,969 0.56 0.21
Question5 How is your arousal right now? Discrete SAM from 0 to 1 with step size 0.125 80,969 0.26 0.22
Question6 Do you feel stressed right now? Continuous Slider in range (0,1) 80,969 0.28 0.24
Question7 How much did you concentrate on the things you are doing right now? Continuous Slider in range (0,1) 80,969 0.58 0.31
Question8_0 Because of the tinnitus it is hard for me to get to sleep Binary YesNoSwitch 7919 0.35 0.48
Question8_1 I am feeling depressed because of the tinnitus Binary YesNoSwitch 10,361 0.23 0.42
Question8_2 I find it harder to relax because of the tinnitus Binary YesNoSwitch 13,904 0.45 0.5
Question8_3 I don’t have any of these symptoms NULL NULL NULL NULL NULL
Question8_4 I have strong worries because of the tinnitus Binary YesNoSwitch 10,839 0.27 0.45
Question8_5 Because of the tinnitus it is difficult to follow a conversation, a piece of music or a film Binary YesNoSwitch 11,877 0.33 0.47
Question8_6 Because of the tinnitus it is difficult to concentrate Binary YesNoSwitch 8220 0.42 0.49
Question8_7 Because of the tinnitus I am more irritable with my family, friends and colleagues Binary YesNoSwitch 3391 0.32 0.47
Question8_8 Because of the tinnitus I am more sensitive to environmental noises Binary YesNoSwitch 9179 0.09 0.29
Qender 0 = Male, 1 = female Binary Single Choice 80,969 0.26 0.44

Note that the count for the questions 8_0, 8_1, ..., q_8 is dependent on the number of individuals that selected this answer in the baseline questionnaire. If an individual selected I don’t have any of these symptoms, no follow-up question appeared, so that these values are NULL. SAM = Self Assessment Manikin65.