European guidelines on quality criteria for diagnostic radiographic images of the lumbar spine – an intra- and inter-observer reproducibility study

Table 2 Inter-observer agreement for general image quality assessment of the lumbar spine (> 4 wks) n = 50

Lumbar projection	Agreement	Expected Agreement	Kappa (k)	Standard Error	Z
AP/PA	86.00%	66.00%	0.5882	0.1303	4.51
Lat. L1-L4	86.00%	51.64%	0.7105	0.1370	5.19
Lat. L5-S1	88.00%	60.76%	0.6942	0.1338	5.19

ISSN: 2045-709X