Table 3.

Effect of duration of treatment on bone markers and BMD scores.

VARIABLES	ON LT- n4 SINCE 5–10 YEARS N = 16	ON LT-4 SINCE 11–15 YEARS N = 9	P-VALUE
Osteocalcin (ng/mL)	24.62 ± 6.97	32.64 ± 8.81	0.03
Calcium (mg/dl)	10.96 ± 0.46	11.6 ± 0.25	0.007
Phosphorus (mg/dl)	4.99 ± 0.98	4.64 ± 0.71	0.465 NS
T-score	−2.10 ± 0.41	−2.88 ± 0.27	0.001
Z-score	−1.64 ± 0.38	−2.34 ± 0.32	0.001

Notes: N, number of subjects in the group; T-score and Z-score are expressed as standard deviations (SDs) below mean; **P-value <0.001 is very significant.