Multiple sclerosis and solar exposure before the age of 15 years: case—control study in Cuba, Martinique and Sicily

2010 ◽  
Vol 16 (8) ◽  
pp. 899-908 ◽  
Author(s):  
F. Dalmay ◽  
D. Bhalla ◽  
A. Nicoletti ◽  
JA Cabrera-Gomez ◽  
P. Cabre ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Case Control Study ◽  
Sun Exposure ◽  
Protective Role ◽  
Case Control ◽  
Solar Exposure ◽  
History Of ◽  
Water Sports ◽  
Control Study

Few studies report a protective role of childhood solar exposure to multiple sclerosis. Our objective was to confirm the protective role of childhood solar exposure in multiple sclerosis in Cuba, Martinique and Sicily. This was a matched case— control study, and cases met Poser criteria for clinically, laboratory (definite, probable) multiple sclerosis. Controls were resident population, without neurological disorder, living close to cases (within 100 km), matched for sex, age (±5 years), residence before age 15. We recruited 551 subjects during a 1-year period (193 cases, Cuba n = 95, Sicily n = 50, Martinique n = 48; 358 controls). Some (89%) met definite clinical multiple sclerosis criteria (relapsing remitting form (with and without sequel) (74%), secondary progressive (21%), primary progressive (5%)). Odds ratios in a uni-variate analysis were: family history of multiple sclerosis (5.1) and autoimmune disorder (4.0); wearing shirt (3.5), hat (2.7), pants (2.4); sun exposure causing sunburn (1.8); sun exposure duration (1 h more/day; weekends 0.91, weekdays 0.86); bare-chested (0.6); water sports (0.2). Independent factors in the multivariate analysis were family history of multiple sclerosis (4.8 (1.50—15.10)), wearing pants under sunlight (1.9 (1.10—3.20)), sun exposure duration (1 h more/ day, weekdays 0.90 (0.85—0.98), weekends 0.93 (0.87—0.99)), water sports (0.23 (0.13—0.40)). We conclude that outdoor leisure activities in addition to sun exposure reports are associated with a reduced multiple sclerosis risk, with evidence of dose response.

Familial multiple sclerosis: does consanguinity have a role?

2010 ◽  
Vol 17 (4) ◽  
pp. 487-489 ◽  
Author(s):  
M Al Jumah ◽  
S Kojan ◽  
A Al Khathaami ◽  
I Al Abdulkaream ◽  
M Al Blawi ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Potential Role ◽  
Case Control Study ◽  
Case Control ◽  
Parental Consanguinity ◽  
Affected Relative ◽  
History Of ◽  
Estimate Prevalence ◽  
Control Study

Parental consanguinity (PC) may be a risk factor for familial multiple sclerosis (FMS) throughout inbred communities. The objective of this report was to estimate prevalence of FMS and rate of PC among FMS versus non-FMS patients. All Saudi MS patients were identified from our registry. The history of PC was analyzed as a case-control study. In total 141 MS patients were identified. Of these, 30 (21%) reported having at least one affected relative, 37.6% reported PC and 16% presented first-degree PC. In addition, FMS patients were more likely than non-FMS patients to report PC. In conclusion, FMS is prevalent among Saudi MS patients. MS patients with a history of PC were more likely to have FMS, suggesting a potential role of consanguinity.

scholarly journals Allium vegetables intake and endometrial cancer risk

2009 ◽  
Vol 12 (9) ◽  
pp. 1576-1579 ◽  
Author(s):  
Carlotta Galeone ◽  
Claudio Pelucchi ◽  
Luigino Dal Maso ◽  
Eva Negri ◽  
Maurizio Montella ◽  
...  
Keyword(s):  
Endometrial Cancer ◽  
Cancer Risk ◽  
Case Control Study ◽  
Wide Spectrum ◽  
Protective Role ◽  
Case Control ◽  
Endometrial Cancer Risk ◽  
Allium Vegetables ◽  
Control Study

AbstractObjectiveThe potential role of allium vegetables on endometrial cancer risk has been scarcely investigated and the results of previous Chinese studies are not easily applicable to Western populations. Therefore, we evaluated the relationship between onion and garlic intake and endometrial cancer, using data from an Italian case–control study.SettingWe analysed data from a multi-centre case–control study of 454 endometrial cancer cases and 908 controls, admitted to the same hospitals for a wide spectrum of acute, non-neoplastic conditions. Information was collected by trained interviewers using a validated and reproducible FFQ. Multivariate odds ratios and 95 % confidence intervals were obtained after allowance for recognized confounding factors.ResultsCompared with non-users, the OR of endometrial cancer for successive categories of onion intake were 0·94 (95 % CI 0·72, 1·21) for <2 portions/week and 0·40 (95 % CI 0·22, 0·72) for ≥2 portions/week, with a significant inverse trend in risk (P = 0·01). The OR for an increment of one portion (i.e. 80 g) of onions per week was 0·81 (95 % CI 0·70, 0·95). For garlic, the OR for successive categories of intake were 0·89 (95 % CI 0·68, 1·15) for intermediate use and 0·62 (95 % CI 0·42, 0·92) for high use, with a significant inverse trend in risk (P = 0·02).ConclusionsOur study found a moderate protective role of allium vegetables on the risk of endometrial cancer.

scholarly journals MTHFR and F5 genetic variations have association with preeclampsia in Pakistani patients: a case control study

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Feriha Fatima Khidri ◽  
Yar Muhammad Waryah ◽  
Faiza Kamran Ali ◽  
Hina Shaikh ◽  
Ikram Din Ujjan ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Case Control Study ◽  
Protective Role ◽  
Case Control ◽  
Amplification Refractory Mutation System ◽  
World Population ◽  
Single Nucleotide Variants ◽  
First Case ◽  
Control Study

Abstract Background To study the role of single nucleotide variants (SNVs) of genes related to preeclampsia in Pakistani pregnant women. Methods After ethical approval and getting informed consent; 250 pregnant women were enrolled and equally divided into two groups (125 preeclamptic cases and 125 normotensive pregnant women). Demographic details and medical history were recorded, and 10 ml blood sample was obtained for DNA extraction. The tetra-primer amplification refractory mutation system (ARMS) assays were developed for assessing the variants of three preeclampsia related genes; F5, MTHFR and VEGFA. An association of six SNVs; F5:c.1601G > A (rs6025), F5:c.6665A > G (rs6027), MTHFR: c.665C > T (rs1801133), MTHFR: c.1286A > C (rs1801131), VEGFA: c.-2055A > C (rs699947) and VEGFA: c.*237C > T (rs3025039) with preeclampsia was determined by using different genetic models. Results Genotyping of the SNVs revealed that patients with MTHFR:c.665C > T, have increased susceptibility to preeclampsia (CT versus CC/TT: OR = 2.79, 95% CI = 1.18–6.59; P* = 0.046 and CT/TT vs CC: OR = 2.91, 95% CI = 1.29–6.57; P* = 0.0497, in overdominant and dominant models, respectively), whereas F5:c.6665A > G, (A/G vs AA/GG: OR = 0.42, 95% CI = 0.21–0.84; P* = 0.038 in overdominant model) and MTHFR:c.1286A > C, (CC versus AA: OR = 0.36, 95% CI = 0.18–0.72; P* = 0.0392 in codominant model) have significantly decreased risk for preeclampsia. F5:c.1601G > A, VEGFA: c.-2055A > C and VEGFA: c.*237C > T variants revealed no relationship with the disease. Conclusion This is the first case control study describing the protective role of F5:c.6665A > G against preeclampsia in any world population. In addition, the present study confirmed the association and role of MTHFR gene variations in the development of preeclampsia in Pakistani patients. Further genetic studies may be required to better understand the complex genetic mechanism of SNVs in preeclampsia related genes in pregnant women.

Predisposing role of vitamin D receptor (VDR) polymorphisms in the development of multiple sclerosis: A case-control study

2016 ◽  
Vol 367 ◽  
pp. 148-151 ◽  
Author(s):  
Rasoul Abdollahzadeh ◽  
Mahsa Sobhani Fard ◽  
Farideh Rahmani ◽  
Kaveh Moloudi ◽  
Behrooz Sadeghi kalani ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Vitamin D ◽  
Vitamin D Receptor ◽  
Case Control Study ◽  
Case Control ◽  
Control Study ◽  
Vdr Polymorphisms

scholarly journals Frequency of HLA-DRB1 Gene Alleles in Patients With Multiple Sclerosis in a Lithuanian Population

Medicina ◽  
2012 ◽  
Vol 48 (1) ◽  
pp. 2
Author(s):  
Renata Balnytė ◽  
Daiva Rastenytė ◽  
Dalia Mickevičienė ◽  
Antanas Vaitkus ◽  
Erika Skrodenienė ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Case Control Study ◽  
Case Control ◽  
Chain Reaction ◽  
Female Patients ◽  
History Of ◽  
Male Patients ◽  
Polymerase Chain ◽  
The Relationship ◽  
Control Study

The aim of the present study was to investigate the influence of HLA-DRB1 alleles on the genetic susceptibility to multiple sclerosis in the Lithuanian population. Material and Methods. A total of 120 patients with multiple sclerosis and 120 unrelated healthy controls were enrolled in this case-control study. Allelic frequencies were compared between the groups. HLA-DRB1 alleles were genotyped using the polymerase chain reaction. Results. HLA-DRB1*15 was present in 55.8% of the patients with multiple sclerosis and 10.0% of the controls (OR, 5.58; 95% CI, 3.19–9.77; P<0.0001). The protective alleles that were found to be more prevalent among the controls compared with the patients with multiple sclerosis were HLADRB1* 01 (26.7% vs. 7.5%, P<0.0001), *03 (17.5% vs. 8.3%, P=0.034), and *16 (11.7% vs. 3.3%, P=0.014). HLA-DRB1*15 was more common among the female patients with multiple sclerosis than among the male patients (68.4% vs. 34.1%; OR, 4.18; 95%, CI 1.90–9.22; P=0.001). The heterozygous inheritance of HLA-DRB1*15 allele was more common in the patients with a history of maternal multiple sclerosis than in those with a history of paternal multiple sclerosis (29.4% vs. 9.8%; P=0.045). Conclusions. HLA-DRB1*15 was found to be associated with multiple sclerosis in the Lithuanian population. This allele was more prevalent among the female patients with multiple sclerosis. Maternal multiple sclerosis was more common than paternal multiple sclerosis, but the relationship with HLA-DRB1*15 allele was not established. HLA-DRB1*01, *03, and *16 appeared to be the protective alleles in this series.

A case–control study of risk factors for multiple sclerosis in Iran

2011 ◽  
Vol 17 (5) ◽  
pp. 550-555 ◽  
Author(s):  
Alvaro Alonso ◽  
Stuart D Cook ◽  
Amir-Hadi Maghzi ◽  
Afshin A Divani
Keyword(s):  
Risk Factors ◽  
Multiple Sclerosis ◽  
Case Control Study ◽  
Past History ◽  
Multivariable Analysis ◽  
Case Control ◽  
Sunlight Exposure ◽  
Farm Animals ◽  
History Of ◽  
Control Study

Background: Numerous studies have assessed risk factors for multiple sclerosis (MS), although none have been conducted previously in Iran. Objective: The objective of this study was to study lifestyle and environmental risk factors of MS in the Iranian population. Methods: A case–control study, including 394 MS cases and 394 matched controls, was conducted in MS clinics in different Iranian cities. Information on lifestyles, environmental exposures, and past medical history was obtained from medical charts and phone interviews. Results: In multivariable analysis, sunlight exposure was associated with a lower risk of MS: the odds ratio (OR) and 95% confidence interval (CI) of MS associated with a 1-h increment in daily sunlight was 0.62 (0.53–0.73). Smoking was associated with MS risk in women (OR: 6.48, 95% CI: 1.46–28.78), but not in men (OR: 0.72, 95% CI: 0.31–1.68) ( p = 0.002 for interaction). Finally, past history of common surgical procedures, infectious disorders, or exposure to pets and farm animals was not associated with MS risk. Conclusions: Different modifiable lifestyles, including sunlight exposure and smoking, were associated with lower MS risk in Iran. Interventions aimed at promoting smoking cessation and, more importantly, at increasing exposure to sunlight might contribute to the prevention of MS.

scholarly journals The Role of Toxoplasma gondii Infection Among Multiple Sclerosis Patient Compared to Ordinary People in South of Iran: A Case-Control Study

2020 ◽  
Vol 17 (3) ◽  
Author(s):  
Mahsa Rahnama ◽  
Qasem Asgari ◽  
Peiman Petramfar ◽  
Davod Tasa ◽  
Vahid Hemati ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Toxoplasma Gondii ◽  
Case Control Study ◽  
Case Control ◽  
Control Group ◽  
Ordinary People ◽  
Serum Samples ◽  
Significant Difference ◽  
Control Study

Background: Toxoplasmosis is a common parasitic disease, which leads to serious disease symptoms in immunocompromised hosts and infants. Recent epidemiologic surveys showed that microbial agents may be associated with some cases of multiple sclerosis (MS). Objectives: This case-control study aimed to examine the role of Toxoplasma gondii in MS by evaluating sero-frequency of anti-T. gondii IgG (ATXAb) antibody between patients with MS and ordinary people in Shiraz Province, south of Iran during 2016 - 2018. Methods: Serum samples obtained from MS patients (n = 130), and a group of age and gender-matched controls (n = 130) with the same socioeconomic status with the patients’ group were collected to evaluate the prevalence of T. gondii IgG antibodies (ATXAb). Moreover, the presence of the ATXAb antibody of the patients and controls was determined by the ELISA test. SPSS 20 software was used to perform the statistical analysis (SPSS, inc., Chicago, USA). Results: Out of 130 (35.4%) cases with MS and 130 (13.8%) controls, 46 and 18 subjects were seropositive for ATXAb, respectively. Based on the chi-square test, a significant difference was observed in terms of the positivity rates of ATXAb between the MS patient group and the control group (P = 0.001). The mean ± standard deviation ATXAb levels in controls and MS patients were found to be 61 ± 34 and 114 ± 47 IU/mL, respectively. Also, there were statistically significant differences between the levels of these two groups (P = 0.001). Conclusions: Given the relationship between toxoplasmosis and MS, it is possible that the prevalence of MS decreases by increasing hygiene and preventing toxoplasmosis.

scholarly journals Dietary Food Groups and Nutrient Intake in Association with Multiple Sclerosis: A Case-Control Study

2021 ◽  
Author(s):  
Monire Fallah Yakhdani ◽  
Mohammad Mohammadi ◽  
Amin Salehi Abargouei ◽  
Masuod Mirzaei ◽  
Abolghasem Rahimdel ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Case Control Study ◽  
Economic Status ◽  
Sun Exposure ◽  
Case Control ◽  
Dietary Intakes ◽  
Food Groups ◽  
Yazd City ◽  
The Relationship ◽  
Control Study

Introduction: It has been proposed that dietary intake is associated with multiple sclerosis (MS). The present case-control study was conducted to investigate the relationship between intake of different food groups and occurrence of MS among the recently diagnosed adult patients in Yazd City, Iran. Materials and Methods: In the current study, a group of 45 patients who have recently been diagnosed with MS and 100 healthy controls were investigated in this research. Participants were matched regarding their gender. Dietary intakes were assessed using a self-administered semi-quantitative food frequency questionnaire (FFQ). Participants also completed a demographic questionnaire including information such as age, gender, marital status, job, education, sun exposure, smoking, sunscreen, body mass index (BMI), economic status, as well as their spouses' occupations and education. Logistic regressions in crude and multivariable-adjusted models were used to investigate the relationship between food groups and the odds of developing MS. Results:  The findings showed that participants with high consumption of fruits, potatoes, refined grains, pickles, and fibers had a significantly lower chance for developing MS after adjustment for the maximum possible confounding variables (P < 0.05). Conclusion: The present study revealed that several food groups or nutrients are associated with the development of MS.  Further multi-central prospective studies including more participants are needed to confirm these results

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