VDR and congestive heart failure: The same experimental group at different ages: the CHF group and BPs group showed that the serum VDR content at the 30-day age was higher than that at the 60-day age, and the serum VDR content of BPs-H and BPs-M groups at the 30-day age was significantly higher than that at the 60-day age (p < 0.05).