title: Missing values in patient reported outcomes: assessment of disability in patients with low back pain.
authors.forename: Gudala
authors.initials: G
authors.lastname: Kapil
authors.forename: Dipika
authors.initials: D
authors.lastname: Bansal
authors.affiliation: Postgraduate Institute of Medical Education and Research Chandigarh, India.
authors.forename: Babita
authors.initials: B
authors.lastname: Ghai
mesh_terms: D004185:Disability Evaluation; D006801:Humans; D017116:Low Back Pain / Q000503:physiopathology*; D008297:Male; D010147:Pain Measurement / Q000295:instrumentation / Q000379:methods; D063868:Patient Outcome Assessment; D011594:Psychometrics / Q000295:instrumentation; D011795:Surveys and Questionnaires / Q000592:standards*