**3.8 Calcium and phosphate products of CRF subjects**

The mean calcium x phosphate products in the CRF group was 42.8 + 21.6mg2/dl2 while that of the control was 28.21 + 2.4mg2/dl2. There was a statistically significant difference in both means (p<0.05). Table 9 shows distribution of calcium x phosphate product amongst the CRF patients. 3 (5%) of the CRF patients had calcium x phosphate product >70mg2/dl2. This was made up of 2 (66%) males and 1 (34%) female. 6 (11%) patients had their calcium x phosphate product between 52 – 70mg2/dl2. This was made up of 2 (33%) males and 4 (67%) females. 43 (82%) patients had their calcium x phosphate products <52mg2/dl2. This was made up of 26 (60%) males and 17 (40%) females. All 3 patients who had calcium x phosphate product >70mg2/dl2 died during the period of study and showed evidence of ROD on postmortem bone biopsy.

Normal Ca x P04 product = <70mg2/dl2.
