Figure 3From: Bone turnover in passive smoking female rat: relationships to change in bone mineral density Levels of osteocalcin, b-ALP and TRACP 5b. There was no significant difference in serum osteocalcin levels between controls and smoke-exposed rats. Significantly lower b-ALP and higher TRACP 5b levels were found in the 3-month or 4-month smoke-exposed female rats compared to controls. Statistics: means ± SD (8 rats per group), *p < 0.05 in comparison to controls.Back to article page