Table 4.

Prediction limits for differences between single measurements in healthy controls.

Variable	${\widehat{\tau }}^2$	${\widehat{\sigma }}_1^2$	${\widehat{\sigma }}_2^2$	${\widehat{\alpha }}_1-{\widehat{\alpha }}_2$	${\widehat{\alpha }}_1-{\widehat{\alpha }}_2-2\times \sqrt{2{\widehat{\tau }}^2+{\widehat{\sigma }}_1^2+{\widehat{\sigma }}_2^2}$	${\widehat{\alpha }}_1-{\widehat{\alpha }}_2+2\times \sqrt{2{\widehat{\tau }}^2+{\widehat{\sigma }}_1^2+{\widehat{\sigma }}_2^2}$
Densito 0–2 mm
Anterior	0.27	0.16	0.09	− 0.41	− 2.18	1.35
Middle	0.08	0.06	0.06	− 0.14	− 1.20	0.92
Posterior	0.13	0.16	0.12	− 0.14	− 1.60	1.33
Total	0.14	0.06	0.05	− 0.21	− 1.46	1.03
Densito 2–6 mm
Anterior	0.20	0.04	0.23	− 0.38	− 2.02	1.25
Middle	0.063	0.02	0.10	− 0.17	− 1.17	0.82
Posterior	0.09	0.09	0.15	− 0.15	− 1.46	1.15
Totala	0.10	0.03	0.13	− 0.24	− 1.43	0.95
Densito 6–10 mm
Anterior	0.29	1.01	0.27	− 0.22	− 2.96	2.51
Middle	0.15	0.17	0.08	− 0.10	− 1.60	1.39
Posterior	0.16	0.10	0.08	− 0.10	− 1.51	1.30
Total	0.18	0.31	0.11	− 0.13	− 1.89	1.62
Densito 10–12 mm
Anterior	4.10	2.72	2.22	0.86	− 6.39	8.11
Middle	0.95	0.49	0.42	0.36	− 3.00	3.72
Posterior	0.83	0.32	0.34	0.11	− 2.93	3.16
Total	1.42	0.82	1.71	0.52	− 4.11	5.16
Densito Total
Anterior	0.35	0.11	0.13	− 0.14	− 2.07	1.80
Middle	0.11	0.03	0.61	− 0.14	− 2.01	1.72
Posteriora	0.18	0.09	0.72	− 0.16	− 2.31	2.00
Total	0.18	0.04	0.54	− 0.16	− 2.11	1.79

The values are in GSU (Gray Scale Units).