The Patient Health Questionnaire-9 (PHQ-9) (a validated depression instrument) and other self-reported measures were obtained from patients with ALS as part of routine clinical care via tablet devices using a software system (Knowledge Program). 
Knowledge Program
The Patient Health Questionnaire-9 (PHQ-9) (a validated depression instrument) and other self-reported measures were obtained from patients with ALS as part of routine clinical care via tablet devices using a software system (Knowledge Program). 
Patient Health Questionnaire-9 (PHQ-9)
Cox proportional hazard models, linear models, mixed effects models, and logistic regression were used for statistical analyses.



Cox proportional hazard models
Cox proportional hazard models, linear models, mixed effects models, and logistic regression were used for statistical analyses.



linear models
Cox proportional hazard models, linear models, mixed effects models, and logistic regression were used for statistical analyses.



mixed effects models
Cox proportional hazard models, linear models, mixed effects models, and logistic regression were used for statistical analyses.



logistic regression