Effect of age, sex and gender on pain sensitivity: A narrative review

© 2017 Eltumi And Tashani. Introduction: An increasing body of literature on sex and gender differences in pain sensitivity has been accumulated in recent years. There is also evidence from epidemiological research that painful conditions are more prevalent in older people. The aim of this narrative review is to critically appraise the relevant literature investigating the presence of age and sex differences in clinical and experimental pain conditions. Methods: A scoping search of the literature identifying relevant peer reviewed articles was conducted on May 2016. Information and evidence from the key articles were narratively described and data was quantitatively synthesised to identify gaps of knowledge in the research literature concerning age and sex differences in pain responses. Results: This critical appraisal of the literature suggests that the results of the experimental and clinical studies regarding age and sex differences in pain contain some contradictions as far as age differences in pain are concerned. While data from the clinical studies are more consistent and seem to point towards the fact that chronic pain prevalence increases in the elderly findings from the experimental studies on the other hand were inconsistent, with pain threshold increasing with age in some studies and decreasing with age in others. Conclusion: There is a need for further research using the latest advanced quantitative sensory testing protocols to measure the function of small nerve fibres that are involved in nociception and pain sensitivity across the human life span. Implications: Findings from these studies should feed into and inform evidence emerging from other types of studies (e.g. brain imaging technique and psychometrics) suggesting that pain in the older humans may have unique characteristics that affect how old patients respond to intervention

Testosterone and mood dysfunction in women with polycystic ovarian syndrome compared to subfertile controls

Women with polycystic ovarian syndrome (PCOS) have been found to suffer from fertility problems and mood dysfunction. To control for any effect of fertility problems, the present study compared mood dysfunction in women with PCOS to non-PCOS women with fertility problems. Seventy-six women with PCOS and 49 subfertile controls reported their anxiety, depression and aggression levels, and the relationship between mood and testosterone (T) was assessed. Controlling for age and BMI using MANCOVA, women with PCOS were significantly more neurotic (had difficulty coping with stress) than controls, had more anger symptoms, were significantly more likely to withhold feelings of anger and had more quality of life problems related to the symptoms of their condition (acne, hirsutism, menstrual problems and emotions). In a subgroup of 30 women matched on age, BMI and ethnicity, it was found that women with PCOS were significantly more anxious and depressed than controls. T was not generally correlated with mood states. This is the first study to identify problems with neuroticism and withholding anger in women with PCOS. These mood problems appear to be mainly attributable to PCOS symptoms, though other factors, such as hypoglycaemia, cannot be ruled out

Anxiety and depression in polycystic ovary syndrome: a systematic review and meta-analysis

BACKGROUND - Our aim was to assess differences in anxiety and depression between women with and without (controls) polycystic ovary syndrome (PCOS). METHODS - We conducted a systematic review and meta-analysis of published literature comparing women with PCOS to control groups on anxiety and depression. Electronic databases were searched up to 17 December 2010. The inverse variance method based, as appropriate, on a random- or fixed-effects model in Review Manager, Version 5 was used to analyse the data. RESULTS - Twelve comparative studies were included; all studies assessed depression (910 women with PCOS and 1347 controls) and six also assessed anxiety (208 women with PCOS and 169 controls). Analysis revealed higher depression (Z = 17.92, P < 0.00001; Hedges’ g = 0.82; 95% CI 0.73–0.92) and anxiety (Z = 5.03, P < 0.00001; Hedges’ g = 0.54; 95% CI 0.33–0.75) scores in the participants with, than without, PCOS. Studies controlling for BMI showed a smaller difference between women with PCOS and controls on anxiety and depression scores than studies not controlling for BMI. CONCLUSIONS - Women with PCOS on average tend to experience mildly elevated anxiety and depression, significantly more than women without PCOS. Women with PCOS with lower BMI tended to have slightly lower anxiety and depression scores, suggesting that having a lower BMI reduces anxiety and depression. Future studies might consider (i) controlling for BMI, (ii) stratifying by medication use in order to control for any anti-androgenic effects of medication and (iii) excluding women with polycystic ovaries from control groups

A review of the affects of worry and generalized anxiety disorder upon cardiovascular health and coronary heart disease

Published online: 16 Jan 2013OBJECTIVE: The aims of this review article are to present psychophysiological and behavioral pathways for the involvement of worry and generalized anxiety disorder (GAD) upon cardiovascular function. The review will focus on persons with and without coronary heart disease (CHD), and encompass etiological and prognostic studies. METHODS: Articles (1975–2011) reporting on GAD or worry affecting CHD prognosis or cardiovascular function were found using MEDLINE, EMBASE, SCOPUS and PsychINFO database searches, and extracted to form a narrative review. RESULTS: Available evidence in experimental and observational studies in CHD free samples consistently showed that worry was associated with diminished heart rate variability (HRV) and elevated heart rate. Worry and GAD were commonly associated with blood pressure and diagnosed hypertension or medication use in both disease-free and established CHD populations. No evidence was found to support worry being beneficial to cardiovascular function or conducive to health promoting behaviors. The literature indicated that measures of worry were associated with fatal and nonfatal CHD in seven etiological studies of initially disease-free individuals; however, females were underrepresented. Three studies reported that GAD was associated with poorer prognosis in establish CHD, independent of depression. The median GAD prevalence was 10.4% in 3266 patients across 15 studies, suggesting that GAD is marginally less common in CHD samples than is depression. CONCLUSIONS: A growing literature highlights the association between worry and development of CHD. The association between worry, GAD and CHD risk factors (e.g. blood pressure), and HRV are leading mechanisms of cardiopathogenesis that may affect cardiovascular function. Findings regarding worry and GAD in established CHD are less clear.Phillip J. Tully, Suzie M. Cosh and Bernhard T. Baun