OBJECTIVES: To make a qualitative analysis of the expectations of chronic low back pain (LBP) sufferers with regard to information gained using semi-directed Internet navigation on a sample of French LBP-related websites, and to compare the results with those of physical medicine and rehabilitation (PMR) medical doctors (MD). MATERIAL AND METHODS: Twenty-seven hospitalised chronic LBP sufferers assessed in ecological conditions a sample of seven LBP-related websites. The sites were assessed using a simplified version of a rating scale of patients' expectations. Analysis of the relative importance of the different kinds of information delivered was done using a point sharing method. RESULTS: In a comfortable environment, patients gave high scores for medical and extra-medical information, but low scores for website design. Overall quality assessment was similar for patients and MDs. The relative importance of medical and extra-medical information, and design quality, was similar for Chronic LBP patients and MDs. CONCLUSION: PMR MD seemed able to correctly evaluate the overall expectations of chronic LBP patients with regard to information, but their opinions on the different qualities of websites were different. Doctors and patients should collaborate in order to create or validate high quality websites concerned with LBP.