3 research outputs found
Native vitamin D in dialysis patients : safety and biological effects
Native vitamine D (VTD) supplementation is recommended by the last KDIGO guidelines in CKD patients including dialysis patients. However, this recommendation is based on a low level of evidence. We designed a randomized double-blind prospective study comparing the effects of VTD and placebo in dialysis patients on mortality, vascular calcifications and different paremeters: 25-OH vitamine D- 25(OH)D -, parathormone (PTH), calcium and phosphorus
Cholecalciferol in haemodialysis patients : a randomized, double-blind, proof-of-concept and safety study
Background. The role of cholecalciferol supplementation
in end-stage renal disease (ESRD) patients has been questioned.
The objective of this randomized double-blinded
study is to assess whether cholecalciferol therapy can
increase serum 25-hydroxyvitamin D [25(OH)D] levels in
haemodialysed patients and the safety implications of this
therapy on certain biological parameters and vascular
calcifications score.
Methods. Forty-three haemodialysis patients were randomized
to receive placebo or cholecalciferol (25 000 IU)
therapy every 2 weeks. The biological parameters, serum
calcium, phosphorus, 25(OH)D and parathormone (PTH)
levels, were monitored monthly for 12 consecutive
months. Vascular calcifications were assessed by lateral
X-ray radiography.
Results. At baseline, the mean serum 25(OH)D levels
were low and similar in both groups. Thirty patients (16
treated and 14 placebo) completed the study: 11 patients
died (5 placebo and 6 treated), 1 patient dropped out and
1 patient was transplanted (both from the placebo group).
After 1 year, the percentage of 25(OH)D deficient patients
was significantly lower in the treated group. None of the
patients developed hypercalcaemia. The PTH levels
tended to increase over the study period under placebo
and to decrease in the cholecalciferol group. The median
changes in PTH levels from baseline to 1 year were statistically
different between the two groups [+80 (−58 to
153) and −115 (−192 to 81) under placebo and cholecalciferol
treatment, respectively, P = 0.02].The calcification
scores increased equivalently in both groups (+2.3 per
year).
Conclusions. Cholecalciferol is effective and safe, and
does not negatively affect calcium, phosphorus, PTH
levels and vascular calcifications. Additional studies are
needed to compare the impacts of nutritional and active
vitamin D agents on vascular calcification and mortality
Interobserver agreement for the ATS/ERS/JRS/ALAT criteria for a UIP pattern on CT.
OBJECTIVES: To establish the level of observer variation for the current ATS/ERS/JRS/ALAT criteria for a diagnosis of usual interstitial pneumonia (UIP) on CT among a large group of thoracic radiologists of varying levels of experience. MATERIALS AND METHODS: 112 observers (96 of whom were thoracic radiologists) categorised CTs of 150 consecutive patients with fibrotic lung disease using the ATS/ERS/JRS/ALAT CT criteria for a UIP pattern (3 categories--UIP, possibly UIP and inconsistent with UIP). The presence of honeycombing, traction bronchiectasis and emphysema was also scored using a 3-point scale (definitely present, possibly present, absent). Observer agreement for the UIP categorisation and for the 3 CT patterns in the entAUe observer group and in subgroups stratified by observer experience, were evaluated. RESULTS: Interobserver agreement across the diagnosis category scores among the 112 observers was moderate, ranging from 0.48 (IQR 0.18) for general radiologists to 0.52 (IQR 0.20) for thoracic radiologists of 10-20 years' experience. A binary score for UIP versus possible or inconsistent with UIP was examined. Observer agreement for this binary score was only moderate. No significant differences in agreement levels were identified when the CTs were stratified according to multidisciplinary team (MDT) diagnosis or patient age or when observers were categorised according to experience. Observer agreement for each of honeycombing, traction bronchiectasis and emphysema were 0.59+/-0.12, 0.42+/-0.15 and 0.43+/-0.18, respectively. CONCLUSIONS: Interobserver agreement for the current ATS/ERS/JRS/ALAT CT criteria for UIP is only moderate among thoracic radiologists, AUrespective of theAU experience, and did not vary with patient age or the MDT diagnosis