Journal of behavioral medicine
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Randomized Controlled Trial
Reduction of conditioned pain modulation in humans by naltrexone: an exploratory study of the effects of pain catastrophizing.
The current study tested the hypothesis that conditioned pain modulation is mediated by the release of endogenous opioids with a placebo-controlled (sugar pill) study of naltrexone (50 mg) in 33 healthy volunteers over two counter-balanced sessions. Pain modulation consisted of rating of heat pain (palm) during concurrent cold water immersion (foot). ⋯ An exploratory analysis revealed that individual differences in catastrophizing moderated the effects of naltrexone; endogenous opioid blockade abolished modulation in subjects lower in catastrophizing while modulation was unaffected by naltrexone among high catastrophizers. The results suggest a role of endogenous opioids in endogenous analgesia, but hint that multiple systems might contribute to conditioned pain modulation, and that these systems might be differentially activated as a function of individual differences in responses to pain.
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Gender-based violence is a well-recognized risk factor for HIV infection among women. Alcohol use is associated with both gender-based violence and sexual risk behavior, but has not been examined as a correlate of both in a context of both high HIV risk and hazardous drinking. The purpose of this paper is to examine the association between recent abuse by a sex partner with alcohol and sexual risk behavior among female patrons of alcohol serving venues in South Africa. ⋯ A hierarchical logistic regression analysis showed that after controlling for alcohol use sexual risk behavior remained significantly associated with gender-based violence, particularly with meeting a new sex partner at the bar, recent STI diagnosis, and engaging in transactional sex, but not protected intercourse or number of partners. In South Africa where heavy drinking is prevalent women may be at particular risk of physical abuse from intimate partners as well as higher sexual risk. Interventions that aim to reduce gender-based violence and sexual risk behaviors must directly work to reduce drinking behavior.
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Greater dispositional optimism has been related to less severe pain; however, whether optimism is associated with endogenous pain modulation has not yet been examined. The beneficial effects of dispositional optimism often vary according to cultural dynamics. Thus, assessing optimism-pain relationships across different ethnic groups is warranted. ⋯ All participants completed a validated measure of dispositional optimism. Greater reported optimism was significantly associated with enhanced CPM, and the strength of this association did not vary according to individuals' ethnic background. These findings suggest that an optimistic disposition may potentiate endogenous pain inhibition.
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Retracted Publication
Preference for immediate reinforcement over delayed reinforcement: relation between delay discounting and health behavior.
Reinforcement from engaging in health behaviors is often delayed by several months or years, a circumstance partly responsible for some people's increased preference for engaging in unhealthy behaviors associated with immediate reinforcement. To examine whether individuals who discount the future engage in fewer health behaviors, 72 young adults completed questionnaires assessing health behaviors and impulsiveness and laboratory-behavioral measures of impulsive decision making. ⋯ Participants who discounted most by delay (i.e., exhibited impulsive choice) engaged in fewer health behaviors than those who showed less impulsive responding. This task, in contrast to a hypothetical choice task or self-reported impulsiveness, measures the actual behavior of discounting by delay, and was the facet of impulsive decision making most closely associated with adopting a range of health behaviors.
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Individuals diagnosed with lung and head and neck (HN) cancers and their spouses are at increased risk for distress. This study assessed whether the way couples communicate about cancer and their perceptions of relationship intimacy influenced both partners' adjustment. One-hundred thirty-nine patients and their spouses [For purposes of clarity, we refer to the patients' intimate partner as the spouse, regardless of actual marital status and we reserve the term partner to refer to the other person in the couple (i.e., the patient's partner is the spouse and the spouse's partner is the patient)] completed measures of spousal communication, intimacy, and distress at three time points over 6 months. ⋯ Patients and spouses who reported greater baseline distress reported more negative baseline communication as well as lower levels of intimacy and greater distress over time. Mediation analyses showed patients' and spouses' reports of positive spousal communication were associated with less subsequent distress largely through their effects on intimacy. Clinicians working with head and neck or lung cancer patients should assess communication and intimacy because both impact couples' distress.