Table 4.

Comparisons of patient-reported outcomes by history of chronic back pain

CharacteristicNo History of Back PainHistory of Back PainP Value
Gastrointestinal Symptoms Rating Scale, total score1.21±0.291.50±0.48<0.001
GSRS domain score
 Reflux1.19±0.551.70±1.180.01
 Abdominal pain1.26±0.491.61±0.660.005
 Indigestion1.28±0.381.62±0.630.002
 Diarrhea1.24±0.531.18±0.370.49
 Constipation1.07±0.141.44±0.69<0.001
SF-36 mental composite score55.1±5.5250.4±9.700.005
SF-36 physical composite score55.1±4.4950.9±7.080.001
  • GSRS, Gastrointestinal Symptoms Rating; SF-36, Short Form-36.