The reliability of patient-reported outcomes in patients with chronic low back pain when answered in online, telephone, and face-to-face interview format

ABSTRACT
 Purpose: Patient-reported outcomes (PROs) are unique indicators of disease and treatment impact on patients that help in the selection correct interventions for their treatment. The aim our study was to investigate reliability PROs frequently used with chronic low back pain face-to-face interview, online, telephone formats.
 Methods: participants were randomized into groups until there at least 120 each groups. All completed Oswestry Disability Index, Roland–Morris Questionnaire, Fremantle Back Awareness Questionnaire according format characteristics group.
 Results: Among 364 patients, online group (n=120) completion time all three questionnaires significantly shorter than interview (n=121) (ODI: p=0.002, RMDQ: p=0.003 FreBAQ: p=0.032) (n=123) p=0.007, p=0.001 p=0.024) When test–retest examined, ODI (ICC: 0.86), RMDQ 0.93), FreBAQ 0.81) showed an excellent correlation group. In group, ODI, RMDQ, good correlations. a 0.74) 0.65), while moderate 0.59). 
 Conclusion: Although had lower correlations both versions compared mostly they adequate reliability. Moreover, version more useful quicker evaluation method version. However, we do not recommend using due its