Table 1

Level of evidence for a causal relationship.

Diagnosis
Risk factor


Computer use per se
Computer mouse time
Computer keyboard time

Tension neck syndrome
+
+
0
Shoulder tendonitis
0
0
0
Epicondylitis (medial or lateral)
0
0
0
Forearm disorders
0
+
0
Wrist tendonitis
+
+
+

+++ Strong evidence

++ Moderate evidence

+ Limited evidence

0 Insufficient evidence

- Evidence suggesting a lack of causal relation

Wærsted et al. BMC Musculoskeletal Disorders 2010 11:79   doi:10.1186/1471-2474-11-79

Open Data