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1.
Public Health Nutr ; 27(1): e129, 2024 Apr 29.
Article in English | MEDLINE | ID: mdl-38680071

ABSTRACT

OBJECTIVE: Inflammation is implicated in chronic diseases including cancer and CVD, which are major causes of mortality. Diet can influence inflammation status. We therefore examined whether the inflammatory potential of a person's diet is associated with mortality. DESIGN: The inflammatory potential of the usual diet was assessed by calculating Dietary Inflammatory Index (DII) scores from repeated FFQ data (collected in 1992, 1994 and 1996), placing each participant's diet on a continuum from anti- to pro-inflammatory. DII scores were analysed as a continuous variable and as categories by creating quartile groups. Death registry data were used to ascertain all-cause mortality and separately mortality from CVD, cancers and other causes between 1992 and 2022. Cox proportional hazard regression analysis was used to calculate adjusted hazard ratios (HR) with 95 % CI, comparing higher and lowest quartile groups, or HR change per one DII unit increase. SETTING: Nambour, Australia. PARTICIPANTS: A community-based sample of 1440 adults aged 25-75 years. RESULTS: During follow-up, 488 participants died, including 188 from CVD, 151 from cancer and 170 from other causes. Participants in the most pro-inflammatory diet group were at increased risk of all-cause mortality (HRQ4 v. Q1 = 1·55; 95 % CI 1·19, 2·03; P < 0·001) and other-cause mortality (HRQ4 v. Q1 = 1·69; 95 % CI 1·12, 2·54; P 0·01). A one-unit increase in DII score was associated with a 36 % increased risk of CVD among those younger than 55 years of age (HR for a one-unit increase in DII score 1·36, 95 % CI 1·04, 1·78). The risk of cancer mortality was also increased for those with a more pro-inflammatory diet in age ≤ 55 years (HR for a one-unit increase in DII score 1·20, 95 % CI 1·02, 1·40) and age 56-65 years (HR for a one-unit increase in DII score 1·11, 95 % CI 1·00, 1·23). CONCLUSIONS: A pro-inflammatory diet increases the risk of all-cause mortality. Our results support the promotion of anti-inflammatory diets to help promote longevity.


Subject(s)
Cardiovascular Diseases , Diet , Inflammation , Neoplasms , Humans , Middle Aged , Male , Female , Inflammation/mortality , Australia/epidemiology , Diet/statistics & numerical data , Diet/mortality , Adult , Aged , Cardiovascular Diseases/mortality , Neoplasms/mortality , Proportional Hazards Models , Risk Factors
2.
Pathol Res Pract ; 251: 154881, 2023 Nov.
Article in English | MEDLINE | ID: mdl-37832354

ABSTRACT

INTRODUCTION: There appear to be several variants of naevoid melanoma suspected as having different outcomes, but follow-up studies have been few. We aimed to assess the prognosis of naevoid melanomas in a multi-centre study. MATERIAL AND METHODS: From histopathology records we ascertained patients in the UK, Australia and Italy diagnosed with maturing naevoid melanoma (n = 65; 14; 7 respectively) and nodular/papillomatous naevoid melanoma (12; 6; 0), and patients with superficial spreading melanoma (SSM) from UK (73) and Australia (26). Melanoma deaths in UK patients were obtained from NHS Digital; in Australia, via the National Death Index and cancer registry; and in Italy, through clinical records. For maturing naevoid vs. SSM, we used Cox-proportional hazard regression models to compare survival adjusted for age, sex, tumour thickness, and ulceration, and additionally Fine-Gray regression analysis, to calculate sub-hazard ratios (SHR) in the UK cohort, accounting for competing causes of death. RESULTS: Among UK patients, there was a non-significantly lower risk of melanoma death in maturing naevoid vs SSM, including after accounting for competing causes of death (SHR 0.40, 95% confidence interval (CI) 0.12-1.31), while among nodular/papillomatous naevoid melanoma patients, there were no melanoma deaths on follow-up. Two melanoma deaths occurred in Australian SSM patients, and none in maturing or nodular/papillomatous naevoid melanoma patients, after 5 years' minimum follow-up. None of the 7 Italian patients with maturing naevoid melanoma died of melanoma after nearly 12 years' average follow-up. CONCLUSIONS: There was no significant difference in risk of death from melanomas with naevoid features, and SSM. Nodular/ papillomatous naevoid melanoma patients did not carry higher risk of death than SSM patients though the very few cases of the papillomatous naevoid variant limited our assessment.


Subject(s)
Melanoma , Papilloma , Skin Neoplasms , Humans , Australia/epidemiology , Skin Neoplasms/pathology , Melanoma/pathology , Prognosis , Melanoma, Cutaneous Malignant
3.
BMC Cancer ; 22(1): 490, 2022 May 03.
Article in English | MEDLINE | ID: mdl-35505292

ABSTRACT

BACKGROUND: Sonic Hedgehog (SHH) pathway dysregulation is implicated in basal cell carcinoma (BCC) development. To evaluate the possible wider role of SHH gene variants in skin carcinogenesis, we assessed associations of genes in the SHH pathway with lifetime development of any keratinocyte cancer (KC), and with developing either BCCs or squamous cell carcinomas (SCCs) exclusively, in a 25-year prospective, population-based study of 1,621 Australians. METHODS: We genotyped 795 unrelated adults with available blood samples: 311 cases with any KC (186 developing BCCs-only, 55 SCCs-only, 70 BCCs and SCCs) and 484 controls. We compared allele frequencies of 158 independent SNPs across 43 SHH genes between cases and controls, and performed a gene-based analysis. RESULTS: We found associations between SNP rs4848627 (GLI2) (related to DNA synthesis in keratinocytes) and development of any KC (OR = 1.53; 95% CI = 1.06-2.13, P < 0.01) and SCCs exclusively (OR = 2.12; 95%CI = 1.39-3.23, P < 0.01). SNP rs3217882 located in CCND2 was associated with exclusive BCC development (OR = 1.43, CI = 1.12-1.82, P < 0.01). The gene-based analysis suggested an association of PRKACG (protein kinase cAMP-activated catalytic subunit gamma) with any KC (P = 0.013). CONCLUSION: We conclude that variants located in genes in the SHH pathway may are involved in SCC as well as BCC development.


Subject(s)
Carcinoma, Basal Cell , Carcinoma, Squamous Cell , Signal Transduction , Skin Neoplasms , Adult , Australia , Carcinoma, Basal Cell/genetics , Carcinoma, Basal Cell/pathology , Carcinoma, Squamous Cell/genetics , Carcinoma, Squamous Cell/pathology , Hedgehog Proteins/genetics , Hedgehog Proteins/metabolism , Humans , Keratinocytes/metabolism , Polymorphism, Single Nucleotide , Prospective Studies , Skin Neoplasms/pathology
4.
Int J Cancer ; 151(3): 396-401, 2022 08 01.
Article in English | MEDLINE | ID: mdl-35403698

ABSTRACT

Based on molecular evidence that melanomas with unknown primary (MUPs) arise from the skin, we hypothesised that sites of MUPs are disproportionately on trunk and lower limbs, sites that are not readily visible to patients and clinicians. We tested this hypothesis by inferring the anatomic site of origin of MUPs from the corresponding known cutaneous sites of melanoma patients with known primary tumours (MKPs). We analysed data from three separate cohorts of patients from Brisbane, Australia (n = 236); Manchester, UK (n = 51) and Padova, Italy (n = 33), respectively, who first presented with stage III melanoma with lymph node metastases. We matched two MKP patients to each MUP patient based on lymph node dissection (LND) site, age and sex, and imputed cutaneous sites of origin of MUPs from their two matched MKPs for study countries, giving two possible sites for each MUP per centre. Overall, results showed that MUP patients were predominantly male, and trunk was the most likely origin, comprising around a third to a half of MUPs across the three cohorts. The remaining MUP inferred sites varied by country. In the Australian cohort, the legs accounted for a third of imputed sites of MUPs, while in the UK and Italian cohorts, the most frequent site was the arms followed by the legs. Our findings suggest the need for regular and thorough skin examination on trunk and limbs, especially in males, to improve early detection of cutaneous melanoma and reduce the risk of metastatic disease at the time of presentation.


Subject(s)
Melanoma , Neoplasms, Unknown Primary , Skin Neoplasms , Australia/epidemiology , Female , Humans , Male , Melanoma/pathology , Neoplasm Staging , Neoplasms, Unknown Primary/pathology , Skin Neoplasms/pathology , Melanoma, Cutaneous Malignant
5.
Dermatology ; 238(4): 657-661, 2022.
Article in English | MEDLINE | ID: mdl-35086087

ABSTRACT

BACKGROUND: Evidence suggests that consumption of dark green leafy vegetables may influence the decrease in the risk of cutaneous squamous cell carcinoma (SCC). Dark green leafy vegetables contain folate as a main component among other nutrients; thus, we hypothesised that their possible observed protective effect on SCC, observed in previous studies, would be more evident in persons with specific genotypes related to folate metabolism. METHODS: Genotyping of methylenetetrahydrofolate reductase (MTHFR) gene variants rs1801133 (C677T) and rs1801131 (A1298C) was carried out for 1,128 participants in an Australian community-based longitudinal study of skin cancer. Dietary intakes were assessed through repeated Food Frequency Questionnaires (1992-1996), and all incident skin cancers were recorded in 1992-2007 and histologically confirmed. We assessed associations between intake of dark green leafy vegetables and SCC development in strata defined by genotype, by calculating relative risks (RRs) with 95% confidence intervals (CIs) using generalised linear models with negative binomial distribution and person-years of follow-up as offset. RESULTS: High versus low intake of dark green leafy vegetables was associated with a lower risk of SCC tumours in carriers of the C677T variant allele (RR = 0.42, 95% CI = 0.23-0.75), and within wild-type A1298C homozygotes (RR = 0.43, 95% CI = 0.22-0.85). CONCLUSION: The protective effect of dark green leafy vegetables on cutaneous SCC may be genotype-dependent. Folate metabolism-related gene polymorphisms should be considered when assessing the relation of green leafy vegetables to cancer risk.


Subject(s)
Carcinoma, Squamous Cell , Skin Neoplasms , Australia/epidemiology , Carcinoma, Squamous Cell/epidemiology , Carcinoma, Squamous Cell/genetics , Case-Control Studies , Folic Acid/metabolism , Genetic Predisposition to Disease , Genotype , Humans , Longitudinal Studies , Methylenetetrahydrofolate Reductase (NADPH2)/genetics , Risk Factors , Skin Neoplasms/genetics , Skin Neoplasms/prevention & control , Vegetables/metabolism
7.
Arch Virol ; 166(9): 2569-2572, 2021 Sep.
Article in English | MEDLINE | ID: mdl-34115212

ABSTRACT

Human papillomaviruses (HPVs) cause superficial epidermal infections and are only cleared if they trigger an immunological response. We analysed SNPs that had previously been investigated for association with HPV infection to determine whether they play a role in the serological response to cutaneous beta-HPVs in an Australian population. Serum samples from 1,142 participants were analysed for seropositivity against the L1 protein of 21 beta-HPV types. Associations between seropositivity to beta-HPV types and the SNPs rs9264942 (HLA-C; HPV-9, p = 0.022, HPV-15, p = 0.043 and HPV-17, p = 0.004), rs12449858 (EVER1; HPV-23, p = 0.029), and rs2981451 (FGFR2; HPV-22, p = 0.049) were identified. We found that certain SNPs could be involved in the serological response to beta-HPVs.


Subject(s)
Alphapapillomavirus/genetics , Papillomaviridae/genetics , Papillomavirus Infections/immunology , Papillomavirus Infections/virology , Polymorphism, Single Nucleotide , Serologic Tests , Adult , Aged , Australia , Female , Genes, Viral/genetics , Genotype , Humans , Male , Middle Aged , Skin/virology
8.
J Invest Dermatol ; 141(4S): 1111-1118.e2, 2021 04.
Article in English | MEDLINE | ID: mdl-32682911

ABSTRACT

The long-term effect of diet on skin aging is largely unknown, but evidence suggests that the antioxidants from foods may mitigate the main component of skin aging caused by sun exposure. We assessed the association between the total antioxidant capacity of foods people eat and the photoaging of their skin. In a community-based, prospective study among 777 Australian adults aged <55 years at baseline, we estimated the total dietary antioxidant capacity of participants' diets in 1992, 1994, and 1996 and graded photoaging severity using microtopography in 1992, 1996, and 2007. We used ordinal logistic regression and applied generalized estimating equations to estimate change in the degree of photoaging associated with increasing total antioxidant capacity compared with the group with the lowest antioxidant capacity, separately in younger (≤45 years) and older (>45 years) adults. In the 15-year study period, the overall prevalence of severe skin photoaging increased from 42% at baseline to 88%. Adults aged >45 years who consumed foods with high antioxidant capacity experienced approximately 10% less photoaging over 15 years than those who ate foods with low antioxidant capacity. No association was found among adults aged ≤45 years. Foods rich in antioxidants as measured by antioxidant capacity may retard skin aging among healthy men and women aged >45 years.


Subject(s)
Antioxidants , Diet Surveys/statistics & numerical data , Feeding Behavior/physiology , Skin Aging/physiology , Sunlight/adverse effects , Adult , Age Factors , Australia , Female , Humans , Longitudinal Studies , Male , Middle Aged , Prospective Studies , Skin Aging/radiation effects
9.
J Cancer Surviv ; 14(5): 712-719, 2020 10.
Article in English | MEDLINE | ID: mdl-32519121

ABSTRACT

PURPOSE: To quantify the prevalence of anxiety or depression (overall; melanoma-related) among people with high-risk primary melanoma, their related use of mental health services and medications, and factors associated with persistent new-onset symptoms across 4 years post-diagnosis. METHODS: A longitudinal study of 675 patients newly diagnosed with tumor-stage 1b-4b melanoma. Participants completed the Hospital Anxiety and Depression Scale and answered questions about fear of cancer recurrence, use of medication, and support, serially over 4 years. We identified anxiety and depression trajectories with group-based trajectories models and factors associated with persistent symptoms with logistic regression. RESULTS: At diagnosis, 93 participants (14%) had melanoma-related anxiety or depression, and 136 (20%) were affected by anxiety and/or depression unrelated to melanoma. After 6 months, no more than 27 (5%) reported melanoma-related anxiety or depression at any time, while the point prevalence of anxiety and depression unrelated to melanoma was unchanged (16-21%) among the disease-free. Of 272 participants reporting clinical symptoms of any cause, 34% were taking medication and/or seeing a psychologist or psychiatrist. Of the participants, 11% (n = 59) had new-onset symptoms that persisted; these participants were more likely aged < 70. CONCLUSIONS: Melanoma-related anxiety or depression quickly resolves in high-risk primary melanoma patients after melanoma excision, while prevalence of anxiety or depression from other sources remains constant among the disease-free. However, one-in-ten develop new anxiety or depression symptoms (one-in-twenty melanoma-related) that persist. IMPLICATIONS FOR CANCER SURVIVORS: Chronic stress has been linked to melanoma progression. Survivors with anxiety and depression should be treated early to improve patient and, potentially, disease outcomes.


Subject(s)
Anxiety/epidemiology , Cancer Survivors/psychology , Depression/epidemiology , Melanoma/diagnosis , Melanoma/psychology , Skin Neoplasms/diagnosis , Skin Neoplasms/psychology , Aged , Anxiety/psychology , Australia/epidemiology , Depression/psychology , Female , Humans , Longitudinal Studies , Male , Middle Aged , Prevalence , Prospective Studies , Melanoma, Cutaneous Malignant
10.
Cancer Epidemiol Biomarkers Prev ; 29(8): 1647-1653, 2020 08.
Article in English | MEDLINE | ID: mdl-32430338

ABSTRACT

BACKGROUND: Experimental evidence suggests that dietary intakes of omega-3 and omega-6 polyunsaturated fatty acids have divergent effects on melanoma growth, but epidemiologic evidence on their combined effect is lacking. METHODS: In 634 Australian patients with primary melanoma, we assessed prediagnosis consumption of 39 food groups by food frequency questionnaires completed within 2 months of diagnosis. We derived, by reduced rank regression, dietary patterns that explained variability in selected omega-3 and omega-6 fatty acid intakes. Prevalence ratios (PR) and 95% confidence intervals (CI) for the association between tertiles of dietary patterns and melanoma thickness >2 mm versus ≤2 mm were estimated using Poisson regression. RESULTS: Overall omega-3 fatty acid intakes were low. Two major fatty acid dietary patterns were identified: "meat, fish, and fat," positively correlated with intakes of all fatty acids; and "fish, low-meat, and low-fat," positively correlated with long-chain omega-3 fatty acid intake, and inversely with medium-chain omega-3 and omega-6 fatty acid intakes. Prevalence of thick melanomas was significantly higher in those in the highest compared with lowest tertile of the "meat, fish, and fat" pattern (PR, 1.40; 95% CI, 1.01-1.94), especially those with serious comorbidity (PR, 1.83; 95% CI, 1.15-2.92) or a family history (PR, 2.32; 95% CI, 1.00-5.35). The "fish, low-meat, and low-fat" pattern was not associated with melanoma thickness. CONCLUSIONS: People with high meat, fish, and fat intakes, who thus consumed relatively high levels of omega-3 and high omega-6 fatty acid intakes, are more likely to be diagnosed with thick than thin melanomas. IMPACT: High omega-3 and omega-6 fatty acid intakes may contribute to patients' presentation with thick melanomas.


Subject(s)
Fatty Acids, Omega-3/therapeutic use , Fatty Acids, Omega-6/therapeutic use , Melanoma/diet therapy , Fatty Acids, Omega-3/pharmacology , Fatty Acids, Omega-6/pharmacology , Female , Humans , Male
12.
JAMA Dermatol ; 155(6): 688-693, 2019 06 01.
Article in English | MEDLINE | ID: mdl-31042258

ABSTRACT

Importance: With emerging new systemic treatments for metastatic melanoma, early detection of disease recurrence is increasingly important. Objective: To investigate the risk of melanoma recurrence in patients with a localized melanoma at a high risk of metastasis. Design, Setting, and Participants: A total of 1254 patients with newly diagnosed, histologically confirmed tumor category T1b to T4b melanoma in Queensland, Australia, were recruited prospectively between October 1, 2010, and October 1, 2014, for participation in a cohort study. Data analysis was conducted from February 8, 2018, to February 20, 2019. We used Cox proportional hazards regression analysis to examine associations between patient and tumor factors and melanoma recurrence. Exposures: Disease-free survival (DFS) by melanoma tumor category defined by the 7th vs 8th editions of the AJCC Cancer Staging Manual (AJCC 7 vs AJCC 8). Main Outcomes and Measures: Melanoma recurrences were self-reported through follow-up questionnaires administered every 6 months and confirmed by histologic or imaging findings. Results: Of 1254 patients recruited, 825 individuals (65.8%) agreed to participate. Thirty-six were found to be ineligible after providing consent and a further 89 patients were excluded after reclassifying tumors using AJCC 8, leaving 700 participants with high-risk primary melanoma (mean [SD] age, 62.2 [13.5] years; 410 [58.6%] men). Independent predictors of recurrence were head or neck site of primary tumor, ulceration, thickness, and mitotic rate greater than 3/mm2 (hazard ratio, 2.36; 95% CI, 1.19-4.71). Ninety-four patients (13.4%) developed a recurrence within 2 years of diagnosis: 66 tumors (70.2%) were locoregional, and 28 tumors (29.8%) developed at distant sites. After surgery for locoregional disease, 37 of 64 patients (57.8%) remained disease free at 2 years, 7 patients (10.9%) developed new locoregional recurrence, and 20 patients (31.3%), developed distant disease. Two-year DFS was similar when comparing AJCC 7 and AJCC 8, for T1b (AJCC 7, 253 [93.3% DFS]; AJCC 8, 242 [93.0% DFS]) and T4b (AJCC 7 and AJCC 8, 50 [68.0% DFS] category tumors in both editions. Patients with T2a to T4a tumors who did not have a sentinel lymph node biopsy (SLNB) at diagnosis had lower DFS than patients with the same tumor category and a negative SLNB (T2a: 136 [91.1%; 95% CI, 86.4-95.9] vs 96 [96.9%; 95 % CI, 93.4-100.0]; T4a: 33 [78.8%; 95% CI, 64.8-92.7] vs 6 [83.3; 95% CI, 53.5-100.0]). Conclusions and Relevance: These findings suggest that 13.4% of patients with a high-risk primary melanoma will experience disease recurrence within 2 years. Head or neck location of initial tumor, SLNB positivity, and signs of rapid tumor growth may be associated with primary melanoma recurrence.


Subject(s)
Lymphatic Metastasis/pathology , Melanoma/pathology , Skin Neoplasms/pathology , Aged , Cohort Studies , Disease-Free Survival , Female , Follow-Up Studies , Humans , Male , Melanoma/therapy , Middle Aged , Neoplasm Metastasis , Neoplasm Recurrence, Local , Neoplasm Staging , Prospective Studies , Queensland , Sentinel Lymph Node Biopsy , Skin Neoplasms/therapy , Surveys and Questionnaires
13.
Am J Prev Med ; 56(5): 742-746, 2019 05.
Article in English | MEDLINE | ID: mdl-30885518

ABSTRACT

INTRODUCTION: Sunscreen is widely used to protect the skin from harmful effects of sun exposure. However, there are concerns that sunscreens may negatively affect overall health. Evidence of the general safety of long-term regular sunscreen use is therefore needed. METHODS: The effect of long-term sunscreen use on mortality was assessed over a 21-year period (1993-2014) among 1,621 Australian adults who had participated in a randomized skin cancer prevention trial of regular versus discretionary sunscreen use (1992-1996). In 2018, an intention-to-treat analysis was conducted using Cox proportional hazards regression to compare death rates in people who were randomized to apply sunscreen daily for 4.5years, versus randomized to use sunscreen at their usual, discretionary level. All-cause mortality and deaths resulting from cardiovascular disease, cancer, and other causes were considered. RESULTS: In total, 160 deaths occurred in the daily sunscreen group compared with 170 deaths in the discretionary sunscreen group (hazard ratio=0.94, 95% CI=0.76, 1.17); 59vs 76 cardiovascular disease deaths (hazard ratio=0.77, 95% CI=0.55, 1.08), 63vs 58 cancer deaths (hazard ratio=1.09, 95% CI=0.76, 1.57), and 45vs 44 deaths resulting from other causes (hazard ratio=1.02, 95% CI=0.67, 1.54) occurred respectively. CONCLUSIONS: Regular use of a sun protection factor 16 sunscreen on head, neck, arms, and hands for 4.5years did not increase mortality.


Subject(s)
Mortality , Skin Neoplasms/prevention & control , Sunburn/prevention & control , Sunscreening Agents/administration & dosage , Adult , Australia/epidemiology , Cause of Death , Female , Follow-Up Studies , Humans , Kaplan-Meier Estimate , Male , Middle Aged , Proportional Hazards Models , Skin Neoplasms/etiology , Sunburn/complications , Sunscreening Agents/adverse effects
15.
J Am Acad Dermatol ; 80(1): 139-148.e4, 2019 Jan.
Article in English | MEDLINE | ID: mdl-30009865

ABSTRACT

BACKGROUND: Melanoma survivors are at high risk of further primary melanomas. OBJECTIVE: To assess sun behavior after melanoma diagnosis and in relation to further primary melanomas. METHODS: We applied repeated measures latent class analysis to reported primary prevention behavior at time of diagnosis and every 6 months for 2 years after diagnosis in patients with clinical stage IB or II melanoma. Correlates of behavior trajectories and risk of subsequent primaries were determined by using multivariable logistic and Cox regression analyses, respectively. RESULTS: Among the 448 male and 341 female patients, sunscreen use fell into 3 trajectories: stable never-use (26% of males and 12% of females), stable sometimes-use (35% of males and 29% of females), and increased to often-use (39% of males and 59% of females). Most reduced their weekend sun exposure, but in 82% of males and 69% of females it remained increased. Males, smokers, the less educated, those who tanned, and those not self-checking their skin were more likely to have trajectories of inadequate protection. Patients with a history of melanoma before the study doubled their risk of another primary melanoma in the next 2 years if sunscreen use in that time was inadequate (hazard ratio, 2.45; 95% confidence interval, 1.00-6.06). LIMITATIONS: Patient-reported data are susceptible to recall bias. CONCLUSION: Our results may assist clinicians in identifying patients not using adequate sun protection and providing information for patient counseling.


Subject(s)
Health Behavior , Melanoma/prevention & control , Neoplasm Recurrence, Local/prevention & control , Skin Neoplasms/prevention & control , Sunbathing/statistics & numerical data , Sunscreening Agents/therapeutic use , Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Prospective Studies , Risk Assessment
16.
Eur J Nutr ; 57(2): 713-722, 2018 Mar.
Article in English | MEDLINE | ID: mdl-27995316

ABSTRACT

PURPOSE: In a well-characterised community-based prospective study, we aimed to systematically assess the differences in associations of plasma omega-3 and omega-6 fatty acid (FA) status with all-cause mortality when plasma FA status is expressed in absolute concentrations versus relative levels. METHODS: In a community sample of 564 women aged 25-75 years in Queensland, Australia, baseline plasma phospholipid FA levels were measured using gas chromatography. Specific FAs analysed were eicosapentaenoic acid, docosapentaenoic acid, docosahexaenoic acid, total long-chain omega-3 FAs, linoleic acid, arachidonic acid, and total omega-6 FAs. Levels of each FA were expressed in absolute amounts (µg/mL) and relative levels (% of total FAs) and divided into thirds. Deaths were monitored for 17 years and hazard ratios and 95% confidence intervals calculated to assess risk of death according to absolute versus relative plasma FA levels. RESULT: In total 81 (14%) women died during follow-up. Agreement between absolute and relative measures of plasma FAs was higher in omega-3 than omega-6 FAs. The results of multivariate analyses for risk of all-cause mortality were generally similar with risk tending to inverse associations with plasma phospholipid omega-3 FAs and no association with omega-6 FAs. Sensitivity analyses examining effects of age and presence of serious medical conditions on risk of mortality did not alter findings. CONCLUSIONS: The directions and magnitude of associations with mortality of absolute versus relative FA levels were comparable. However, plasma FA expressed as absolute concentrations may be preferred for ease of comparison and since relative units can be deduced from absolute units.


Subject(s)
Fatty Acids, Omega-3/blood , Fatty Acids, Omega-6/blood , Health Status , Nutritional Status , Phospholipids/blood , Adult , Aged , Algorithms , Biomarkers/blood , Cause of Death , Cohort Studies , Fatty Acids, Omega-3/analysis , Fatty Acids, Omega-6/analysis , Female , Follow-Up Studies , Humans , Middle Aged , Mortality , Phospholipids/chemistry , Proportional Hazards Models , Prospective Studies , Queensland/epidemiology , Registries
17.
Psychooncology ; 27(5): 1442-1449, 2018 05.
Article in English | MEDLINE | ID: mdl-29044793

ABSTRACT

OBJECTIVE: Because melanoma patients are at high risk of further disease, we aimed to study their melanoma prevention behaviours. METHODS: In a large cohort of patients newly diagnosed with high-risk melanoma in Queensland, Australia, we assessed clustering of preventive behaviours using latent class analysis. We assessed associated factors with prevalence proportion ratios (PPRs) and 95% confidence intervals (CIs) estimated by Poisson regression and also if preventive behaviour was associated with better tumour prognosis at diagnosis. RESULTS: Among 789 primary melanoma patients (57% male; 21% with previous melanoma), we identified 4 different behaviour clusters: "no/ low prevention" (34% of cohort), "sun protection only" (25%), "skin checks only" (25%), and "sun protection and skin checks" (17%). Prevalence of clusters differed between males and females and also the component behaviours. Preventive behaviours were associated with having skin that burned and past cutaneous cancer, and for males, combined sun protective and skin checking behaviour was associated with higher education and non-smoking. In patients with no past history of cutaneous cancer, males in the "skin checks only" cluster had significantly reduced chances of a thick (poor prognosis) melanoma (PPR = 0.79, 95% CI 0.68, 0.91) and females in the "sun protection and skin checks" cluster were significantly less likely to have an ulcerated melanoma (PPR = 0.85, 95% CI 0.74, 0.98) compared with the "no/ low prevention" cluster. CONCLUSION: These findings allow tailoring of preventive advice to melanoma patients to reduce their risk of future primary and recurrent disease.


Subject(s)
Attitude to Health , Melanoma/prevention & control , Primary Prevention , Secondary Prevention , Skin Neoplasms/prevention & control , Sunburn/prevention & control , Sunscreening Agents/administration & dosage , Adult , Aged , Australia , Cluster Analysis , Cohort Studies , Female , Humans , Male , Melanoma/psychology , Middle Aged , Prevalence , Queensland , Self-Examination , Skin Neoplasms/psychology
19.
J Invest Dermatol ; 137(12): 2599-2605, 2017 12.
Article in English | MEDLINE | ID: mdl-28842323

ABSTRACT

Ulcerated primary melanomas are associated with an inflammatory tumor microenvironment. We hypothesized that systemic proinflammatory states and anti-inflammatory medications are also associated with a diagnosis of ulcerated melanoma. In a cross-sectional study of 787 patients with newly diagnosed clinical stage IB or II melanoma, we estimated odds ratios for the association of proinflammatory factors (high body mass index, diabetes, cardiovascular disease, hypertension, and smoking) or the use of anti-inflammatory medications (statins, aspirin, corticosteroids, and nonsteroidal anti-inflammatory drugs), with ulcerated primary melanoma using regression models and subgroup analyses to control for melanoma thickness and mitotic rate. On the basis of information from 194 patients with ulcerated and 593 patients with nonulcerated primary melanomas, regular statin users had lower likelihood of a diagnosis of ulcerated primary melanoma (odds ratio 0.67, 95% confidence interval 0.45-0.99), and this association remained after adjusting for age, sex, thickness, and mitosis. When analysis was limited to melanomas that were ≤2 mm thick and had ≤2 mitoses/mm2 (40 ulcerated; 289 without ulceration), patients with diabetes had significantly raised odds of diagnosis of ulcerated melanoma (odds ratio 2.90, 95% confidence interval 1.07-7.90), adjusted for age, sex, body mass index, and statin use. These findings support our hypotheses that statin use is inversely associated, and diabetes is positively associated, with ulcerated melanoma.


Subject(s)
Diabetes Mellitus/drug therapy , Hydroxymethylglutaryl-CoA Reductase Inhibitors/therapeutic use , Melanoma/complications , Melanoma/drug therapy , Skin Neoplasms/complications , Skin Neoplasms/drug therapy , Adrenal Cortex Hormones/pharmacology , Adult , Aged , Anti-Inflammatory Agents, Non-Steroidal/pharmacology , Aspirin/pharmacology , Cross-Sectional Studies , Diabetes Complications/drug therapy , Diabetes Complications/genetics , Female , Humans , Hydroxymethylglutaryl-CoA Reductase Inhibitors/pharmacology , Hypertension/complications , Inflammation , Male , Melanoma/genetics , Middle Aged , Mitosis , Odds Ratio , Prognosis , Prospective Studies , Queensland , Skin Neoplasms/genetics , Skin Ulcer/pathology , Smoking , Melanoma, Cutaneous Malignant
20.
Eur J Nutr ; 56(4): 1455-1465, 2017 Jun.
Article in English | MEDLINE | ID: mdl-26919993

ABSTRACT

BACKGROUND: Dietary intake is one of the most modifiable risk factors associated with obesity. However, data on the relationship between dietary patterns and long-term weight change are limited. PURPOSE: We therefore investigated the association between dietary patterns and 15-year weight change in a sample of 1186 Australian adults (1992-2007). METHODS: We measured body weight and collected data on socio-demographic and lifestyle characteristics in 1992 and 2007. Applying principal component analysis to 38 food groups from a food frequency questionnaire collected at baseline, we identified two dietary patterns: 'meat-and-fat' and 'fruit-and-vegetable.' Using generalized estimating equations, multivariable regression models, stratified by sex, were adjusted for concurrent changes in socio-demographic and lifestyle variables. RESULTS: The average increase in body weight of men in the highest tertile of the meat-and-fat pattern was more than twice that of men in the lowest tertile; mean weight change (95 % CI): 4.8 (-0.1, 9.7) kg versus 2.3 (-2.6, 7.1) kg, P-for-trend = 0.02. In contrast, average weight gain of men in the highest tertile of the fruit-and-vegetable pattern was only about half that of men in the lowest tertile; mean weight change (95 % CI): 2.9 (-2.0, 7.8) kg versus 5.4 (-1.5, 10.4) kg, P-for-trend = 0.02. Among women, dietary patterns were not related to weight change. CONCLUSIONS: These dietary patterns predict change in body weight in men, but not in women. In this cohort, a dietary pattern high in fruit and vegetables was related to less weight gain in men than a dietary pattern high in meat and fat.


Subject(s)
Diet , Obesity/epidemiology , Weight Gain , Adult , Aged , Australia/epidemiology , Body Mass Index , Dietary Fats/administration & dosage , Female , Follow-Up Studies , Fruit , Humans , Life Style , Longitudinal Studies , Male , Meat , Middle Aged , Nutrition Assessment , Principal Component Analysis , Risk Factors , Sample Size , Socioeconomic Factors , Surveys and Questionnaires , Vegetables
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