scholarly journals Response to: ‘Correspondence on ‘Systemic evaluation of the relationship between psoriasis, psoriatic arthritis and osteoporosis: observational and Mendelian randomisation study’’ by Cui et al

2020 ◽  
pp. annrheumdis-2020-219183
Author(s):  
Ke-Qi Liu ◽  
Jiangwei Xia ◽  
Qiu-Ping Chen ◽  
Jian-Qiang Yang ◽  
Hou-Feng Zheng
Keyword(s):  
Psoriatic Arthritis ◽  
Mendelian Randomisation ◽  
The Relationship

scholarly journals Systemic evaluation of the relationship between psoriasis, psoriatic arthritis and osteoporosis: observational and Mendelian randomisation study

2020 ◽  
Vol 79 (11) ◽  
pp. 1460-1467 ◽  
Author(s):  
Jiangwei Xia ◽  
Shu-Yang Xie ◽  
Ke-Qi Liu ◽  
Lin Xu ◽  
Pian-Pian Zhao ◽  
...  
Keyword(s):  
Psoriatic Arthritis ◽  
Causal Effect ◽  
Genetic Risk Score ◽  
Final Analysis ◽  
Ultrasound Measurement ◽  
Mendelian Randomisation ◽  
Mineral Density ◽  
Medication Treatment ◽  
Weighted Genetic Risk Score ◽  
The Relationship

Objectives and methodsWith 432 513 samples from UK Biobank dataset, multivariable linear/logistic regression were used to estimate the relationship between psoriasis/psoriatic arthritis (PsA) and estimated bone mineral density (eBMD)/osteoporosis, controlling for potential confounders. Here, confounders were set in three ways: model0 (including age, height, weight, smoking and drinking), model1 (model0 +regular physical activity) and model2 (model1 +medication treatments). The eBMD was derived from heel ultrasound measurement. And 4904 patients with psoriasis and 847 patients with PsA were included in final analysis. Mendelian randomisation (MR) approach was used to evaluate the causal effect between them.ResultsLower eBMD were observed in patients with PsA than in controls in both model0 (β-coefficient=−0.014, p=0.0006) and model1 (β-coefficient=−0.013, p=0.002); however, the association disappeared when conditioning on treatment with methotrexate or ciclosporin (model2) (β-coefficient=−0.005, p=0.28), mediation analysis showed that 63% of the intermediary effect on eBMD was mediated by medication treatment (p<2E-16). Patients with psoriasis without arthritis showed no difference of eBMD compared with controls. Similarly, the significance of higher risk of osteopenia in patients with PsA (OR=1.27, p=0.002 in model0) could be eliminated by conditioning on medication treatment (p=0.244 in model2). Psoriasis without arthritis was not related to osteopenia and osteoporosis. The weighted Genetic Risk Score analysis found that genetically determined psoriasis/PsA were not associated with eBMD (p=0.24 and p=0.88). Finally, MR analysis showed that psoriasis/PsA had no causal effect on eBMD, osteoporosis and fracture.ConclusionsThe effect of PsA on osteoporosis was secondary (eg, medication) but not causal. Under this hypothesis, psoriasis without arthritis was not a risk factor for osteoporosis.

scholarly journals Lack of an association between gallstone disease and bilirubin levels with risk of colorectal cancer: a Mendelian randomisation analysis

2021 ◽  
Author(s):  
Richard Culliford ◽  
Alex J. Cornish ◽  
Philip J. Law ◽  
Susan M. Farrington ◽  
Kimmo Palin ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Large Scale ◽  
Causal Effect ◽  
Gallstone Disease ◽  
Epidemiological Studies ◽  
Mendelian Randomisation ◽  
Linear Relationships ◽  
Potential Risk Factors ◽  
The Relationship ◽  
Circulating Levels

Abstract Background Epidemiological studies of the relationship between gallstone disease and circulating levels of bilirubin with risk of developing colorectal cancer (CRC) have been inconsistent. To address possible confounding and reverse causation, we examine the relationship between these potential risk factors and CRC using Mendelian randomisation (MR). Methods We used two-sample MR to examine the relationship between genetic liability to gallstone disease and circulating levels of bilirubin with CRC in 26,397 patients and 41,481 controls. We calculated the odds ratio per genetically predicted SD unit increase in log bilirubin levels (ORSD) for CRC and tested for a non-zero causal effect of gallstones on CRC. Sensitivity analysis was applied to identify violations of estimator assumptions. Results No association between either gallstone disease (P value = 0.60) or circulating levels of bilirubin (ORSD = 1.00, 95% confidence interval (CI) = 0.96–1.03, P value = 0.90) with CRC was shown. Conclusions Despite the large scale of this study, we found no evidence for a causal relationship between either circulating levels of bilirubin or gallstone disease with risk of developing CRC. While the magnitude of effect suggested by some observational studies can confidently be excluded, we cannot exclude the possibility of smaller effect sizes and non-linear relationships.

scholarly journals Nail Involvement in Patients with Psoriatic Arthritis in Northern Iran

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
O. Zargari ◽  
E. Kazemnezhad Leyli ◽  
S. Z. Azimi
Keyword(s):  
Psoriatic Arthritis ◽  
Severe Disease ◽  
Cross Sectional Study ◽  
Joint Involvement ◽  
Sectional Study ◽  
Northern Iran ◽  
Cross Sectional ◽  
The Relationship ◽  
Nail Involvement

Background. Psoriatic arthritis (PsA) results in an increased burden of psoriasis and impairs both quality of life and an individual’s functional capacity. The relationship between nail involvement and PsA in psoriasis is not fully characterized. Aim. To evaluate the frequency and characteristics of nail involvement in psoriatic patients and to assess the relationship with joint involvement. Methods. A total of 197 patients with moderate-to-severe psoriasis were consecutively invited to participate in this cross-sectional study. The patients are divided into two groups: those with and those without psoriatic arthritis. Results. 69.5% of psoriatic (137 out of 197) patients had nail involvement. The most common nail abnormality was onycholysis, followed by pitting and oil droplet changes. Nail involvement was more common in patients with psoriatic arthritis (82.1% versus 57.8%, p=0.001). Conclusion. Nail involvement is commonly associated with PsA. Onycholysis, splinter hemorrhage, and oil drop were significantly more common in the PsA group as opposed to patients with just skin findings. In general, psoriatic patients with arthritis had more severe disease.

scholarly journals Evaluating the relationship between circulating lipoprotein lipids and apolipoproteins with risk of coronary heart disease: A multivariable Mendelian randomisation analysis

PLoS Medicine ◽  
2020 ◽  
Vol 17 (3) ◽  
pp. e1003062 ◽  
Author(s):  
Tom G. Richardson ◽  
Eleanor Sanderson ◽  
Tom M. Palmer ◽  
Mika Ala-Korpela ◽  
Brian A. Ference ◽  
...  
Keyword(s):  
Coronary Heart Disease ◽  
Heart Disease ◽  
Mendelian Randomisation ◽  
Lipoprotein Lipids ◽  
The Relationship

scholarly journals Publisher Correction: Mendelian randomisation study of the relationship between vitamin D and risk of glioma

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hannah Takahashi ◽  
Alex J. Cornish ◽  
Amit Sud ◽  
Philip J. Law ◽  
Ben Kinnersley ◽  
...  
Keyword(s):  
Vitamin D ◽  
Mendelian Randomisation ◽  
The Relationship

Defining Low Disease Activity States in Psoriatic Arthritis using Novel Composite Disease Instruments

2015 ◽  
Vol 43 (2) ◽  
pp. 371-375 ◽  
Author(s):  
Laura C. Coates ◽  
Philip S. Helliwell
Keyword(s):  
Psoriatic Arthritis ◽  
Disease Activity ◽  
Disease Activity Score ◽  
Activity Index ◽  
Disease Activity Index ◽  
Substantial Agreement ◽  
Good Discrimination ◽  
Low Disease Activity ◽  
Minimal Disease ◽  
The Relationship

Objective.To explore the relationship between minimal disease activity (MDA) and the low disease activity cutoffs of the Psoriatic ArthritiS Disease Activity Score (PASDAS) and the Composite Psoriatic Disease Activity Index (CPDAI).Methods.Data from the GRAPPA (Group for Research and Assessment of Psoriasis and Psoriatic Arthritis) composite exercise (GRACE) study were used for these analyses. Alternative definitions of low disease activity were used with 6/7 and 7/7 of MDA items, and a criteria set mandating the 2 articular items and 3/5 alternate items (MDA-joints). Two reference questions were used as anchors: physician’s global opinion of MDA, and patient’s opinion on their disease control.Results.Substantial agreement was found between MDA, MDA-joints, PASDAS, and CPDAI. Compared to the 2 reference questions, the various definitions of low disease activity gave sensitivities that were generally worse than specificities, the latter being high (> 0.9) in most cases. Both PASDAS and CPDAI demonstrated good discrimination between the “low” and “high” disease activity states by all the MDA definitions. Using these data, with an MDA of 7/7 to define a very low disease cutoff, the corresponding values for PASDAS and CPDAI were 1.9 and 2, respectively.Conclusion.An MDA score of 7/7 is proposed as very low disease activity in psoriatic arthritis. Using this definition, the equivalent cutoffs for PASDAS and CPDAI are 1.9 and 2, respectively.

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