The symptom of night pain in a back pain triage clinic.

Study Design: Prospective longitudinal study of patients attending a back pain triage clinic with night pain.

Objective: To assess the importance of the symptom of night pain in patients attending a back pain triage clinic.

Summary Of Background Data: The 1994 US Agency for Health Care Policy and Research guidelines suggest nighttime pain should be used as a "red flag.

A comparison of traditional protractor versus Oxford Cobbometer radiographic measurement: intraobserver measurement variability for Cobb angles.

Study Design: A comparison between measurement of radiographs using a traditional protractor method and the Oxford Cobbometer, which has the potential to reduce error.

Objective: To assess measurement variability of Cobb angles using the Oxford Cobbometer and to compare it to that of measurements made using the traditional protractor method.

Summary Of Background Data: Studies of the Cobb method have multiple sources of error and subsequent intraobserver variability.