Table 1 Global compliance in Danish chiropractic clinics to the individual CEC Quality Criteria for Diagnostic Radiographic Images – all measurements presented

 1.1.1. Visually sharp reproduction of the upper and lower-plate surfaces

0.89

(0.85–0.92)

 1.1.2. Visually sharp reproduction of pedicles

0.93

(0.89–0.95)

 1.1.3. Reproduction of the intervertebral joints

0.81

(0.76–0.86)

 1.1.4. Reproduction of the spinous and transverse processes

0.84

(0.80–0.88)

 1.1.5. Visually sharp reproduction of the cortex and trabecular structures

0.66

(0.60–0.71)

 1.1.6. Reproduction of the adjacent soft tissues, particularly the psoas shadows

0.97

(0.94–0.98)

 1.1.7. Reproduction of the sacro-iliac joints

0.90

(0.86–0.93)

 1.2.1. Visually details down to diameter 0.3–0.5 mm

0.92

(0.88–0.94)

 1.3.1. Image Acceptability (acceptable = scores 2 or 3)

0.72

(0.66–0.77)

 2.1.1. Visually sharp reproduction of the upper and lower-plate surfaces

0.92

(0.88–0.95)

 2.1.2. Full superimposition of the posterior vertebral edges

0.82

(0.78–0.87)

 2.1.3. Reproduction of the pedicles and the intervertebral foramina

0.96

(0.93–0.98)

 2.1.4. Visualization of the spinous processes

0.79

(0.74–0.84)

 2.1.5. Visually sharp reproduction of the cortex and trabecular structures

0.20

(0.15–0.25)

 2.2.1. Visually details down to diameter 0.5 mm at 3rd lumbar vertebral body

0.37

(0.32–0.43)

 2.3.1. Image Acceptability (acceptable = scores 2 or 3)

0.66

(0.60–0.71)

 3.1.1. Reproduction by tangential production of the inferior end plate of L5^a

0.81

(0.76–0.86)

 3.1.2. Visualization of the spinous process of L5

0.85

(0.80–0.89)

 3.1.3. Visualization of the anterior border of the upper sacrum

0.96

(0.93–0.98)

 3.1.4. Reproduction of the vertebral pieces of the upper sacrum

0.75

(0.70–0.80)

 3.2.1. Linear and reticular details down to diameter 0.5 mm.

0.27

(0.22–0.32)

 3.3.1. Image Acceptability (acceptable = scores 2 or 3)

0.78

(0.73–0.83)