In 49 patients receiving continuous ambulatory peritoneal dialysis, we assessed the relative influences of adequacy of dialysis (assessed by kinetic transfer/volume urea) and psychological symptoms (depression and anxiety) upon the patients' evaluation of their overall quality of life (QoL). Subjects completed self-rating forms for anxiety, depressive, and somatic symptoms, for discrete areas relevant to QoL, and for overall QoL; clinicians also rated QoL. Depressive symptoms proved a much stronger correlate of overall QoL than did the biochemical measure of dialysis adequacy, and they remained influential even after adjustment for anxiety, kinetic transfer/volume, and somatic symptoms. In contrast, the effects of kinetic transfer/volume, anxiety symptoms, and somatic symptoms dropped sharply when adjusted for the other variables. Because psychological (especially depressive) symptoms may be stronger determinants of patients' overall QoL than is adequacy of dialysis, assessing QoL and psychological status should be part of the care of end-stage renal disease patients.
Objective To determine the contribution of vitamin C (Vit C) status in relation to hemoglobin (Hb) levels in patients on long-term peritoneal dialysis (PD). Methods 56 stable PD patients were evaluated in a cross-sectional survey. Plasma samples were collected for Vit C (analyzed by HPLC with electrochemical detection) and high-sensitivity C-reactive protein (hs-CRP) determinations. Clinical records were reviewed for Hb, transferrin saturation (TSAT), ferritin, erythropoietin (EPO) dose, and other clinical parameters. Dietary Vit C intake was evaluated by patient survey and from patient records. Total Vit C removed during PD treatment was measured in 24-hour dialysate collections. Results Patients showed a highly skewed distribution of plasma Vit C levels, with 40% of patients below normal plasma Vit C levels (<30 μmol/L) and 9% at higher than normal levels (>80 μmol/L). Higher plasma Vit C levels were associated with higher Hb levels (Pearson r = 0.33, p < 0.004). No direct connection between Vit C levels and reported dietary intake could be established. In stepwise multiple regression, plasma Vit C remained significantly associated with Hb (p = 0.017) but there was no significant association with other variables (dialysis vintage, age, ferritin, TSAT, hs-CRP, residual renal function, and EPO dose). In 9 patients that were evaluated for Vit C in dialysate, plasma Vit C was positively associated (Spearman r = 0.85, p = 0.01) with the amount of Vit C removed during dialysis treatment. Conclusions These data indicate that plasma Vit C is positively associated with higher Hb level. Vit C status could play a major role in helping PD patients to utilize iron for erythropoiesis and achieve a better Hb response during anemia management.
The actual and desired frequency of intercourse was studied in 68 randomly selected chronic peritoneal dialysis (CPD) patients. The results were correlated with standard measures of depression (Beck Depression inventory), anxiety (Patient Related Anxiety Scale), physical symptoms (Kupfer-Detre System 2), adequacy of dialysis (KT/Vurea) and nutrition (serum albumin level). In addition, patients assessed their quality of life (PAQOL) using an 1 to 10 analog scale. The mean +/- SD age of all patients studied was 54 +/- 11 yr, the mean dialysis duration was 24 +/- 24 months; 46% of the patients were female, and 34% were diabetic. Sixty-three percent of the patients reported never having intercourse (Group 1), 19% reported having intercourse < or = two times per month (Group II), and 18% reported having intercourse > two times per month (Group III). Dialysis duration, serum albumin level, KT/Vurea, and age were not significantly different among the three groups. Nearly 50% of patients in Group I desired to have intercourse, and 54% of the patients in Group II desired to have intercourse more frequently, Group I patients had significantly higher depression and anxiety scores, more physical symptoms, a poorer overall PAQOL, and less satisfaction with their sexual activity than Group III patients. These results suggest that there is a high prevalence of sexual difficulties in CPD patients. Patients not having intercourse have a poorer quality of life and higher degree of depression and anxiety than patients having intercourse more than two times per month.
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