Keywords:
Observer performance, MR, Musculoskeletal joint, Musculoskeletal bone, Obstetrics
Authors:
C. Metzler1, C. A. Agten2, A. Rosskopf3, M. Zanetti2, C. A. Binkert1, E. Prentl1, C. W. A. Pfirrmann2; 1Winterthur/CH, 2Zuerich/CH, 3Zurich/CH
DOI:
10.1594/essr2018/P-0048
Results
The prevalence of bone marrow edema was high in both groups (13/17(76.5%) vaginal deliveries and 10/13(76.9%) cesarean deliveries) for reader 1 (p=0.992) and 14/17(82.4%) and 10/13(76.9%) for reader 2 (p=0.762).
There were no significant differences regarding the extension of bone marrow edema (reader 1: right side 2.5±3.3mm vs.
6.3±7.3mm,
p=0.300; left side 3.4±4.1mm vs.
4.1±4.6mm,
p=0.837) and the presence of fluid in the joint gap (4/17(23.5%) vs.
2/13 (15.4%) (p=0.580) for reader 1 (similar for reader 2)).
Futhermore no significant differences were found regarding ligamentous changes,
as well as the presence of subchondral sclerosis and cysts.
Joint space width was comparable in both groups (2.6±0.7mm vs.
3.1±1.2mm,
p=0.198).
Disruption of the pubic symphysis (joint space width > 10mm) was not present in both groups.
Only one fracture in the vaginal birth group was found by one of the two investigators.
Interreader agreement for the evaluation of bone morrow edema was good (kappa 0.717,
p<0.001) whereas interreader aggrement for ligamentous changes,
sclerosis and cysts was poor (kappa values ranging from 0.061 to 0.25).