Vertebrae | 1990 | 1994 | 1998 | 2001 | 2005 |
|---|
Method #1
| Â | Â | Â | Â | Â |
T4-T12
|
47
±
2
|
38
±
2
|
34
±
1
|
28
±
2
|
24
±
2
|
L1-L4 | 26 ± 1 | 19 ± 2 | 17 ± 1 | 13 ± 1 | 10 ± 2 |
Method #2
2
| Â | Â | Â | Â | Â |
T4-T11
|
45
|
39
|
35
|
34
| Â |
T4-T10
| Â | Â | Â | Â |
33
|
T12-L4 | 30 | 24 | 22 | 22 | Â |
T11-L33
| Â | Â | Â | Â | 23 |
Method #2
4
| Â | Â | Â | Â | Â |
T4-T11
|
45
|
38
| Â | Â |
34
|
T5-T11
| Â | Â |
36
| Â | Â |
T12-L4 | 27 | Â | Â | Â | 22 |
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1The values for the primary thoracic curvature are provided in bold-faced type. Method #1: values for Cobb angle represent means and standard deviation from triplicate readings by each of three readers independent of this study, according to protocols defined by Goldberg et al. [66]. Cobb magnitude mean values for the primary and secondary curvatures, in 1990, were statistically distinct from the mean values in 2005 (p < 0.001). Method #2: Two readers from independent institutions carried out non-blinded readings from film copies provided by the authors.
-
2Method #2, measurements by Reader #1.
-
3L2-L3 intervertebral space narrowing and degeneration with spur formation. The character of the primary thoracic curve from 1990-2005 was judged to be altered, from eight included vertebrae to seven (T4 - T11 to T4-T10). The altered endpoints are provided.
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4Method #2, measurements by Reader #2. The character of the primary thoracic curve from 1990-2005 was judged to be altered, from eight included vertebrae to seven (T4-T11 to T5-T11). The altered endpoints are provided.
