Related references
Note: Only part of the references are listed.Bias in clinical intervention research
LL Gluud
AMERICAN JOURNAL OF EPIDEMIOLOGY (2006)
A practical approach to spine registers in Europe: the Swedish experience
P Fritzell et al.
EUROPEAN SPINE JOURNAL (2006)
Health-related quality of life assessment by the EuroQol-5D can provide cost-utility data in the field of low-back surgery
TK Solberg et al.
EUROPEAN SPINE JOURNAL (2005)
The risk of getting worse after lumbar microdiscectomy
TK Solberg et al.
EUROPEAN SPINE JOURNAL (2005)
Using publicly available directories to trace survey nonresponders and calculate adjusted response rates
BJ Harvey et al.
AMERICAN JOURNAL OF EPIDEMIOLOGY (2003)
Influence of follow-up methodology and completeness on apparent clinical outcome of fundoplication
R Ludemann et al.
AMERICAN JOURNAL OF SURGERY (2003)
Questionnaire color and response rates to mailed surveys - A randomized trial and a meta-analysis
JF Etter et al.
EVALUATION & THE HEALTH PROFESSIONS (2002)
Increasing response rates to postal questionnaires: systematic review
P Edwards et al.
BRITISH MEDICAL JOURNAL (2002)
Sample size slippages in randomised trials: exclusions and the lost and wayward
KF Schulz et al.
LANCET (2002)
Assessing research outcomes by postal questionnaire with telephone follow-up
CJ Parker et al.
INTERNATIONAL JOURNAL OF EPIDEMIOLOGY (2000)
Lumbar spinal stenosis:: Conservative or surgical management?: A prospective 10-year study
T Amundsen et al.
SPINE (2000)
Surgical and nonsurgical management of lumbar spinal stenosis - Four-year outcomes from the Maine lumbar spine study
SJ Atlas et al.
SPINE (2000)