Reporting of acute low back pain in a telephone interview. Identification of potential biases

Spine (Phila Pa 1976). 1995 Apr 1;20(7):787-90.


Study design: This was a survey of 235 individuals with and 132 individuals without documented low back pain.

Objectives: To approximate the magnitude of potential reporting biases in estimates of prevalence of and medical care use in low back pain.

Summary of background data: The use of survey techniques presents several possible biases in the reporting of acute symptoms. These biases are especially pertinent in musculoskeletal symptoms, which often are recurrent and not life-threatening.

Methods: Two-hundred-thirty-five patients with acute low back pain were contacted by telephone 4-16 months after their physician visit and surveyed regarding the presence and date of back pain episodes. One-hundred-thirty-two patients who had no functionally disabling back pain on physician interview were interviewed.

Results: Of the patients who had sought care for back pain, 21% indicated they had not had back pain when interviewed 4-16 months later. Episodes of pain that occurred more than 8 months before the interview tended to be recalled as occurring more recently than they actually occurred, confirming "forward telescoping" of the illness episode. Only 3% of the individuals without functionally impairing pain reported such pain on a separate interview.

Conclusions: Lack of recall occurs regarding acute low back pain, usually a self-limited illness. This potential under-estimate of back pain prevalence may be balanced by forward telescoping of the date of illness occurrence.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Acute Disease
  • Adult
  • Ambulatory Care
  • Bias
  • Data Collection
  • Female
  • Humans
  • Interviews as Topic
  • Low Back Pain / epidemiology*
  • Male
  • Mental Recall
  • Prevalence
  • Telephone*
  • Time Factors