Impact of residual kidney function on hemodialysis adequacy and patient survival

ABSTRACTBackgroundBoth dialysis dose and residual kidney function (RKF) contribute to solute clearance and are associated with outcomes in hemodialysis patients. We hypothesized that the association between dialysis dose and mortality is attenuated with greater RKF.MethodsAmong 32 251 incident hemodialysis patients in a large US dialysis organization (2007–11), we examined the interaction between single-pool Kt/V (spKt/V) and renal urea clearance (rCLurea) levels in survival analyses using multivariable Cox proportional hazards regression model.ResultsThe median rCLurea and mean baseline spKt/V were 3.06 [interquartile range (IQR) 1.74–4.85] mL/min/1.73 m2 and 1.32 ± 0.28, respectively. A total of 7444 (23%) patients died during the median follow-up of 1.2 years (IQR 0.5–2.2 years) with an incidence of 15.4 deaths per 100 patient-years. The Cox model with adjustment for case-mix and laboratory variables showed that rCLurea modified the association between spKt/V and mortality (Pinteraction = 0.03); lower spKt/V was associated with higher mortality among patients with low rCLurea (i.e. <3 mL/min/1.73 m2) but not among those with higher rCLurea. The adjusted mortality hazard ratios (aHRs) and 95% confidence intervals of the low (<1.2) versus high (≥1.2) spKt/V were 1.40 (1.12–1.74), 1.21 (1.10–1.33), 1.06 (0.98–1.14), and 1.00 (0.93–1.08) for patients with rCLurea of 0.0, 1.0, 3.0 and 6.0 mL/min/1.73 m2, respectively.ConclusionsIncident hemodialysis patients with substantial RKF do not exhibit the expected better survival at higher hemodialysis doses. RKF levels should be taken into account when deciding on the dose of dialysis treatment among incident hemodialysis patients.

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Sex differences in the 10-year survival of patients undergoing maintenance hemodialysis in the Q-Cohort Study

Scientific Reports ◽

10.1038/s41598-021-03551-x ◽

2022 ◽

Vol 12 (1) ◽

Author(s):

Hiroaki Tsujikawa ◽

Shunsuke Yamada ◽

Hiroto Hiyamuta ◽

Masatomo Taniguchi ◽

Kazuhiko Tsuruya ◽

...

Keyword(s):

Proportional Hazards ◽

Japanese Patients ◽

Hemodialysis Patients ◽

Cox Proportional Hazards ◽

Maintenance Hemodialysis ◽

Cox Proportional Hazards Models ◽

Hazard Ratios ◽

Risk Of Mortality ◽

Related Mortality

AbstractWomen have a longer life expectancy than men in the general population. However, it has remained unclear whether this advantage is maintained in patients undergoing maintenance hemodialysis. The aim of this study was to compare the risk of mortality, especially infection-related mortality, between male and female hemodialysis patients. A total of 3065 Japanese hemodialysis patients aged ≥ 18 years old were followed up for 10 years. The primary outcomes were all-cause and infection-related mortality. The associations between sex and these outcomes were examined using Cox proportional hazards models. During the median follow-up of 8.8 years, 1498 patients died of any cause, 387 of whom died of infection. Compared with men, the multivariable-adjusted hazard ratios (95% confidence interval) for all-cause and infection-related mortality in women were 0.51 (0.45–0.58, P < 0.05) and 0.36 (0.27–0.47, P < 0.05), respectively. These findings remained significant even when propensity score-matching or inverse probability of treatment weighting adjustment methods were employed. Furthermore, even when the non-infection-related mortality was considered a competing risk, the infection-related mortality rate in women was still significantly lower than that in men. Regarding all-cause and infection-related deaths, women have a survival advantage compared with men among Japanese patients undergoing maintenance hemodialysis.

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Sex-Specific Associations between Blood Pressure and Risk of Atrial Fibrillation Subtypes in the Tromsø Study

Journal of Clinical Medicine ◽

10.3390/jcm10071514 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1514

Author(s):

Hilde Espnes ◽

Jocasta Ball ◽

Maja-Lisa Løchen ◽

Tom Wilsgaard ◽

Inger Njølstad ◽

...

Keyword(s):

Atrial Fibrillation ◽

Blood Pressure ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Pressure Management ◽

Reference Models ◽

Proportional Hazards Regression ◽

Hazard Ratios ◽

Increased Risk

The aim of this study was to explore sex-specific associations between systolic blood pressure (SBP), hypertension, and the risk of incident atrial fibrillation (AF) subtypes, including paroxysmal, persistent, and permanent AF, in a general population. A total of 13,137 women and 11,667 men who participated in the fourth survey of the Tromsø Study (1994–1995) were followed up for incident AF until the end of 2016. Cox proportional hazards regression analysis was conducted using fractional polynomials for SBP to provide sex- and AF-subtype-specific hazard ratios (HRs) for SBP. An SBP of 120 mmHg was used as the reference. Models were adjusted for other cardiovascular risk factors. Over a mean follow-up of 17.6 ± 6.6 years, incident AF occurred in 914 (7.0%) women (501 with paroxysmal/persistent AF and 413 with permanent AF) and 1104 (9.5%) men (606 with paroxysmal/persistent AF and 498 with permanent AF). In women, an SBP of 180 mmHg was associated with an HR of 2.10 (95% confidence interval [CI] 1.60–2.76) for paroxysmal/persistent AF and an HR of 1.80 (95% CI 1.33–2.44) for permanent AF. In men, an SBP of 180 mmHg was associated with an HR of 1.90 (95% CI 1.46–2.46) for paroxysmal/persistent AF, while there was no association with the risk of permanent AF. In conclusion, increasing SBP was associated with an increased risk of both paroxysmal/persistent AF and permanent AF in women, but only paroxysmal/persistent AF in men. Our findings highlight the importance of sex-specific risk stratification and optimizing blood pressure management for the prevention of AF subtypes in clinical practice.

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The Efficacy of Etoposide-Based Therapy in Adult Secondary Hemophagocytic Lymphohistiocytosis

Acta Haematologica ◽

10.1159/000514920 ◽

2021 ◽

pp. 1-9

Author(s):

Leonard Naymagon ◽

Douglas Tremblay ◽

John Mascarenhas

Keyword(s):

Hemophagocytic Lymphohistiocytosis ◽

Proportional Hazards ◽

Multivariable Analysis ◽

Cox Proportional Hazards ◽

Rank Test ◽

Kaplan Meier ◽

Hazard Ratios ◽

Significant Difference ◽

The Impact

Data supporting the use of etoposide-based therapy in hemophagocytic lymphohistiocytosis (HLH) arise largely from pediatric studies. There is a lack of comparable data among adult patients with secondary HLH. We conducted a retrospective study to assess the impact of etoposide-based therapy on outcomes in adult secondary HLH. The primary outcome was overall survival. The log-rank test was used to compare Kaplan-Meier distributions of time-to-event outcomes. Multivariable Cox proportional hazards modeling was used to estimate adjusted hazard ratios (HRs) with 95% confidence intervals (CIs). Ninety adults with secondary HLH seen between January 1, 2009, and January 6, 2020, were included. Forty-two patients (47%) received etoposide-based therapy, while 48 (53%) received treatment only for their inciting proinflammatory condition. Thirty-three patients in the etoposide group (72%) and 32 in the no-etoposide group (67%) died during follow-up. Median survival in the etoposide and no-etoposide groups was 1.04 and 1.39 months, respectively. There was no significant difference in survival between the etoposide and no-etoposide groups (log-rank <i>p</i> = 0.4146). On multivariable analysis, there was no association between treatment with etoposide and survival (HR for death with etoposide = 1.067, 95% CI: 0.633–1.799, <i>p</i> = 0.8084). Use of etoposide-based therapy was not associated with improvement in outcomes in this large cohort of adult secondary HLH patients.

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Consumption of flavonoid-rich fruits, flavonoids from fruits, and stroke risk: a prospective cohort study

British Journal Of Nutrition ◽

10.1017/s0007114521000404 ◽

2021 ◽

pp. 1-26

Author(s):

Qi Gao ◽

Jia-Yi Dong ◽

Renzhe Cui ◽

Isao Muraki ◽

Kazumasa Yamagishi ◽

...

Keyword(s):

Lower Risk ◽

Stroke Risk ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Dietary Factors ◽

Citrus Fruits ◽

Proportional Hazards Regression ◽

Hazard Ratios ◽

Index Study

Abstract We sought to examine the prospective associations of specific fruit consumption, in particular flavonoid-rich fruit (FRF) consumption, with the risk of stroke and subtypes of stroke in a Japanese population. A study followed a total of 39,843 men and 47,334 women aged 44-76 years, and free of cardiovascular disease, diabetes, and cancer at baseline since 1995 and 1998 to the end of 2009 and 2012, respectively. Data on total and specific FRF consumption for each participant were obtained using a self-administrated food frequency questionnaire. The hazard ratios (HRs) of stroke in relation to total and specific FRF consumption were estimated through Cox proportional hazards regression models. During a median follow-up of 13.1 years, 4092 incident stroke cases (2557 cerebral infarctions and 1516 hemorrhagic strokes) were documented. After adjustment for age, body mass index, study area, lifestyles, dietary factors, and other risk factors, it was found that total FRF consumption was associated with a significantly lower risk of stroke in women (HR= 0.70; 95% CI, 0.58-0.84), while the association in men was not significant (HR= 0.93; 95% CI, 0.79-1.09). As for specific FRFs, consumptions of citrus fruits, strawberries, and grapes were found associated with a lower stroke risk in women. Higher consumptions of FRFs, in particular citrus fruits, strawberries, and grapes, were associated with a lower risk of developing stroke in Japanese women.

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Supper Timing and Cardiovascular Mortality: The Japan Collaborative Cohort Study

Nutrients ◽

10.3390/nu13103389 ◽

2021 ◽

Vol 13 (10) ◽

pp. 3389

Author(s):

Jingyun Tang ◽

Jia-Yi Dong ◽

Ehab S. Eshak ◽

Renzhe Cui ◽

Kokoro Shirai ◽

...

Keyword(s):

Hemorrhagic Stroke ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Stroke Mortality ◽

Hazard Ratios ◽

Risk Of Mortality ◽

Increased Risk ◽

Study Participants

Evidence on the role of supper timing in the development of cardiovascular disease (CVD) is limited. In this study, we examined the associations between supper timing and risks of mortality from stroke, coronary heart disease (CHD), and total CVD. A total of 28,625 males and 43,213 females, aged 40 to 79 years, free from CVD and cancers at baseline were involved in this study. Participants were divided into three groups: the early supper group (before 8:00 p.m.), the irregular supper group (time irregular), and the late supper group (after 8:00 p.m.). Cox proportional hazards regression models were used to calculate hazard ratios (HRs) for stroke, CHD, and total CVD according to the supper time groups. During the 19-year follow-up, we identified 4706 deaths from total CVD. Compared with the early supper group, the multivariable HR of hemorrhagic stroke mortality for the irregular supper group was 1.44 (95% confidence interval [CI]: 1.05–1.97). There was no significant association between supper timing and the risk of mortality from other types of stroke, CHD, and CVD. We found that adopting an irregular supper timing compared with having dinner before 8:00 p.m. was associated with an increased risk of hemorrhagic stroke mortality.

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Relationship of lycopene intake and consumption of tomato products to incident CVD

British Journal Of Nutrition ◽

10.1017/s0007114512005417 ◽

2013 ◽

Vol 110 (3) ◽

pp. 545-551 ◽

Cited By ~ 54

Author(s):

Paul F. Jacques ◽

Asya Lyass ◽

Joseph M. Massaro ◽

Ramachandran S. Vasan ◽

Ralph B. D'Agostino Sr

Keyword(s):

Repeated Measures ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Supporting Evidence ◽

Inverse Association ◽

Cvd Risk ◽

Stroke Incidence ◽

Hazard Ratios ◽

Increased Risk

Evidence for cardioprotective effects of lycopene is inconsistent. Studies of circulating lycopene generally report inverse associations with CVD risk, but studies based on lycopene intake do not. The failure of dietary studies to support the findings based on biomarkers may be due in part to misclassification of lycopene intakes. To address this potential misclassification, we used repeated measures of intake obtained over 10 years to characterise the relationship between lycopene intake and the incidence of CVD (n314), CHD (n171) and stroke (n99) in the Framingham Offspring Study. Hazard ratios (HR) for incident outcomes were derived from Cox proportional hazards regression models using logarithmically transformed lycopene intake adjusted for CVD risk factors and correlates of lycopene intake. HR were interpreted as the increased risk for a 2·7-fold difference in lycopene intake, a difference approximately equal to its interquartile range. Using an average of three intake measures with a 9-year follow-up, lycopene intake was inversely associated with CVD incidence (HR 0·83, 95 % CI 0·70, 0·98). Using an average of two intake measures and 11 years of follow-up, lycopene intake was inversely associated with CHD incidence (HR 0·74, 95 % CI 0·58, 0·94). Lycopene intake was unrelated to stroke incidence. The present study of lycopene intake and CVD provides supporting evidence for an inverse association between lycopene and CVD risk; however, additional research is needed to determine whether lycopene or other components of tomatoes, the major dietary source of lycopene, are responsible for the observed association.

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Validation of CA-125 concentration nadir within the normal range following primary treatment as a predictor of survival for epithelial ovarian cancer (EOC)

Journal of Clinical Oncology ◽

10.1200/jco.2007.25.18_suppl.16007 ◽

2007 ◽

Vol 25 (18_suppl) ◽

pp. 16007-16007

Author(s):

A. Prat ◽

J. Del Campo ◽

S. Peralta ◽

S. Cedres ◽

A. Perez ◽

...

Keyword(s):

Proportional Hazards ◽

Cox Model ◽

Primary Treatment ◽

Cox Proportional Hazards ◽

University Hospital ◽

Stage Iii ◽

Ca 125 ◽

Rank Test ◽

Normal Range

16007 Background: Recent studies suggest that the CA-125 nadir within the normal range after surgery and chemotherapy treatment is a predictor of survival (Crawford, ASCO 2004; Crawford, Ann Oncol 2005) and relapse (Markman, J Clin Oncol 2006). In order to validate these previous findings, we have conducted a retrospective analysis of patients (pts) treated in our institution for EOC. Methods: Between March 1, 1997, and October 30, 2005, all pts treated for EOC at Vall d'Hebron University Hospital were identified from the tumor registry database and screened retrospectively for their standard prognostic factors (age at diagnosis (=65 vs. >65), stage (III-IV vs. IC-II), and suboptimal vs. optimal cytorreduction). Inclusion criteria: an elevated CA-125 at time of diagnosis (>35 U/mL); primary treatment (PT) that consisted in surgery and intravenous carboplatin/paclitaxel for a maximum of 6–9 cycles; complete clinical and radiological response to initial treatment with normalization of CA-125 (=35 U/mL); and disease status at the time of last follow-up. Standard Kaplan-Meier methods were used to plot the progression-free survival (PFS) of members of each of the nadir groups. The relative contribution of the different potential correlates of prognosis was assessed by the Cox proportional hazards method. Results: 123 pts were identified: 64 Group A (=10 U/mL), 42 Group B (11–20 U/mL), 17 Group C (21–35 U/mL). Median age: 56. Stage IC 25%, II 13%, III 52%, IV 10%. Median follow-up 39.2 months (m). Median PFS was 69.7 m, 27.7 m, and 15.8 m for A, B and C, respectively (p< .0001, log-rank test). The Cox model showed a highly-significant impact on PFS in relation to CA-125 nadir levels, residual tumor after surgery and stage. Hazard ratios (HR) for PFS (95% CI) of B vs. A, C vs. B, and C vs. A were 1.98 (p= .034), 2.35 (p= .02), and 4.67 (p< .001), respectively. HR for PFS (95% CI) of suboptimal vs. optimal cytorreduction and stage III-IV vs. IC-II were 1.84 (p= .058) and 3.2 (p= .002), respectively. Conclusions: The CA-125 nadir in the normal range following PT for EOC is a reproducible predictor of PFS in stage IC-IV. Prospective studies of maintenance-consolidation therapies or different approaches in selected pts based on CA-125 nadir seem warranted. No significant financial relationships to disclose.

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Effect of Bariatric Surgery on Survival and Hospitalizations in Patients with Severe Obesity. A Retrospective Cohort Study

Nutrients ◽

10.3390/nu13093150 ◽

2021 ◽

Vol 13 (9) ◽

pp. 3150

Author(s):

Enrica Migliore ◽

Amelia Brunani ◽

Giovannino Ciccone ◽

Eva Pagano ◽

Simone Arolfo ◽

...

Keyword(s):

Bariatric Surgery ◽

Cohort Study ◽

Retrospective Cohort Study ◽

Retrospective Cohort ◽

Proportional Hazards ◽

Severe Obesity ◽

Hospital Admissions ◽

Cox Proportional Hazards ◽

Hazard Ratios

Bariatric surgery (BS) confers a survival benefit in specific subsets of patients with severe obesity; otherwise, effects on hospital admissions are still uncertain. We assessed the long-term effect on mortality and on hospitalization of BS in patients with severe obesity. This was a retrospective cohort study, including all patients residing in Piedmont (age 18–60 years, BMI ≥ 40 kg/m2) admitted during 2002–2018 to the Istituto Auxologico Italiano. Adjusted hazard ratios (HR) for BS were estimated for mortality and hospitalization, considering surgery as a time-varying variable. Out of 2285 patients, 331 (14.5%) underwent BS; 64.4% received sleeve gastrectomy (SG), 18.7% Roux-en-Y gastric bypass (RYGB), and 16.9% adjustable gastric banding (AGB). After 10-year follow-up, 10 (3%) and 233 (12%) patients from BS and non-BS groups died, respectively (HR = 0.52; 95% CI 0.27–0.98, by a multivariable Cox proportional-hazards regression model). In patients undergoing SG or RYGB, the hospitalization probability decreased significantly in the after-BS group (HR = 0.77; 0.68–0.88 and HR = 0.78; 0.63–0.98, respectively) compared to non-BS group. When comparing hospitalization risk in the BS group only, a marked reduction after surgery was found for all BS types. In conclusion, BS significantly reduced the risk of all-cause mortality and hospitalization after 10-year follow-up.

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Visual impairment and risk of dementia in two population-based prospective cohorts: UK Biobank and EPIC-Norfolk

The Journals of Gerontology Series A ◽

10.1093/gerona/glab325 ◽

2021 ◽

Author(s):

Thomas J Littlejohns ◽

Shabina Hayat ◽

Robert Luben ◽

Carol Brayne ◽

Megan Conroy ◽

...

Keyword(s):

Visual Impairment ◽

Proportional Hazards ◽

Population Based ◽

Cox Proportional Hazards ◽

Uk Biobank ◽

Cox Proportional Hazards Models ◽

Hazard Ratios ◽

Promising Target ◽

Increased Risk

Abstract Visual impairment has emerged as a potential modifiable risk factor for dementia. However, there are a lack of large studies with objective measures of vison and with more than ten years of follow-up. We investigated whether visual impairment is associated with an increased risk of incident dementia in UK Biobank and EPIC-Norfolk. In both cohorts, visual acuity was measured using a “logarithm of the minimum angle of resolution” (LogMAR) chart and categorised as no (≤0.30 LogMAR), mild (>0.3 - ≤0.50 LogMAR), and moderate to severe (>0.50 LogMAR) impairment. Dementia was ascertained through linkage to electronic medical records. After restricting to those aged ≥60 years, without prevalent dementia and with eye measures available, the analytic samples consisted of 62,206 UK Biobank and 7,337 EPIC-Norfolk participants, respectively. In UK Biobank and EPIC-Norfolk. respectively, 1,113 and 517 participants developed dementia over 11 and 15 years of follow-up. Using multivariable cox proportional-hazards models, the hazard ratios for mild and moderate to severe visual impairment were 1.26 (95% Confidence Interval [CI] 0.92-1.72) and 2.16 (95% CI 1.37-3.40), in UK Biobank, and 1.05 (95% CI 0.72-1.53) and 1.93 (95% CI 1.05-3.56) in EPIC-Norfolk, compared to no visual impairment. When excluding participants censored within 5 years of follow-up or with prevalent poor or fair self-reported health, the direction of the associations remained similar for moderate impairment but were not statistically significant. Our findings suggest visual impairment might be a promising target for dementia prevention, however the possibility of reverse causation cannot be excluded.

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Association Between Pre-diagnostic Dietary Supplements Intake and Ovarian Cancer Survival: Findings From a Prospective Cohort Study in Chinese Women

Frontiers in Nutrition ◽

10.3389/fnut.2021.758178 ◽

2021 ◽

Vol 8 ◽

Author(s):

Jia-Hui Gu ◽

Ting-Ting Gong ◽

Qi-Jun Wu ◽

Fang-Hua Liu ◽

Zhao-Yan Wen ◽

...

Keyword(s):

Ovarian Cancer ◽

Dietary Supplements ◽

Detrimental Effect ◽

Cancer Survival ◽

Proportional Hazards ◽

Chinese Women ◽

Cox Proportional Hazards ◽

Hazard Ratios ◽

Ovarian Cancer Survival

Background: As a result of a limited number of studies and inconsistent findings, there remains uncertainty in whether pre-diagnostic dietary supplements intake affects survival after ovarian cancer (OC) diagnosis.Methods: The association between pre-diagnostic dietary supplements intake and all-cause OC mortality was examined in the OC follow-up study, which included a hospital-based cohort (n = 703) of Chinese women diagnosed with OC between 2015 and 2020. Pre-diagnostic dietary supplements information was collected using self-administered questionnaires. Deaths were ascertained up to March 31, 2021, via death registry linkage. Cox proportional hazards were used to estimate hazard ratios (HR) and 95% confidence intervals (CI) for the aforementioned association.Results: A total of 130 women died during the median follow-up of 37.2 months (interquartile: 24.7–50.2 months). We found no evidence that any pre-diagnostic dietary supplements intake compared with never is associated with OC survival (HR = 0.75, 95%CI: 0.47–1.18). Furthermore, our study suggested no association for ever supplements intakes of vitamin A (HR = 0.48, 95%CI: 0.07–3.46), vitamin C (HR = 0.64, 95%CI: 0.27–1.54), vitamin D (HR = 1.19, 95%CI: 0.28–5.03), vitamin E (HR = 0.47, 95%CI: 0.06–3.87), multivitamin (HR = 0.49, 95%CI: 0.14–1.67), calcium (HR = 0.96, 95%CI: 0.53–1.72), and fish oil/DHA (HR = 0.31, 95%CI: 0.04–2.37) with OC survival. Interestingly, we only found a detrimental effect of vitamin B supplementation intake (HR = 3.78, 95%CI: 1.33–0.69) on OC survival.Conclusions: We found no evidence that any pre-diagnostic dietary supplements intake is associated with OC survival. Considering lower exposure of dietary supplements before OC diagnosis in the present study, further studies are warranted to confirm these findings.

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