Cause-specific mortality and second cancer incidence after non-Hodgkin lymphoma: a report from the Childhood Cancer Survivor Study

Second primary malignancies and premature death are a concern for patients surviving treatment for childhood lymphomas. We assessed mortality and second malignant neoplasms (SMNs) among 1082 5-year survivors of non-Hodgkin lymphoma (NHL) in the Childhood Cancer Survivor Study, a multi-institutional North American retrospective cohort study of cancer survivors diagnosed from 1970 to 1986. Standardized mortality ratios (SMRs) and standardized incidence ratios (SIRs) were calculated using US population rates. Relative risks for death and solid tumor SMNs were calculated based on demographic, clinical, and treatment characteristics using Poisson regression models. There were 87 observed deaths (SMR = 4.2; 95% CI, 1.8-4.1) with elevated rates of death from solid tumors, leukemia, cardiac disease, and pneumonia. Risk for death remained elevated beyond 20 years after NHL. Risk factors for death from causes other than NHL included female sex (rate ratio [RR] = 3.4) and cardiac radiation therapy exposure (RR = 1.9). There were 27 solid tumor SMNs (SIR = 3.9; 95% CI, 2.6-5.7) with 3% cumulative incidence between 5 and 20 years after NHL diagnosis. Risk factors were female sex (RR = 3.1), mediastinal NHL disease (RR = 5.2), and breast irradiation (RR = 4.3). Survivors of childhood NHL, particularly those treated with chest RT, are at continued increased risk of early mortality and solid tumor SMNs.     

Perception and practice of contraception among male soldiers in Sobi barracks,Ilorin, Nigeria

Background

There is a popular belief among the general population that Nigerian soldiers tend to have large families but this has not been substantiated with evidence-based research. The Nigerian military health authority implements female-targetted contraception strategies, with less focus on their husbands; who are the dominant fertility determinants.

Objective

To determine the perception and practice of contraception among male soldiers of Sobi Cantonment, Ilorin, Nigeria, with a view to instituting male-targeted contraceptive/family planning strategies.

Methodology

A cross-sectional survey of 334 male soldiers using multistage sampling technique and pre-tested interviewer administered questionnaires.

Results

The respondents'' approval of contraception (73.6%) and willingness to discuss it with their spouses/partners (71.6%) were high. Fear of wives/partner''s sexual promiscuity (55.7%), cultural and religious beliefs (43.2%), fear of the side effects of contraceptives (29.5%) and the desire for more children (21.6%) were reported reasons for the non-approval of contraception. The prevalence of contraceptive use among the respondents was low (12.3%). There was a significant relationship between the respondents'' educational level and contraceptive use (p< 0.05).

Conclusion

The study revealed a high approval and willingness to discuss contraception with their spouses/partners but low contraceptive use.     

View-invariant representations of familiar objects by neurons in the inferior temporal visual cortex

A view-invariant representation of objects in the brain would have many computational advantages. Here we describe a population of single neurons in the temporal visual cortex (IT) that have view-invariant representations of familiar objects. Ten real plastic objects were placed in the monkeys' home cages for a period of time before neurophysiological experiments in which neuronal responses were measured to four views of each object. The macaques performed a visual fixation task, and had never been trained in object discrimination. The majority of the visual neurons recorded were responsive to some views of some objects and/or to the control stimuli, as would be expected from previous studies. However, a small subset of these neurons were responsive to all views of one or more of the objects, providing evidence that these neurons were coding for objects, rather than simply for individual views or visual features within the image. This result was confirmed by information theoretic analyses, which showed that the neurons provided information about which object was being seen, independently of the view. The coding scheme was shown to be sparse distributed, with relatively independent information being provided by the different neurons. Hypotheses about how these view-invariant cells are formed are described.      

Prospective randomized study of the efficacy of hydrogel, hydrocolloid, and saline solution—moistened dressings on the management of pressure ulcers

A total of 67 patients with pressure ulcers were randomized into one of three treatment modalities: hydrogel sheet dressing, hydrocolloid, or wet-to-moist gauze. Safety, efficacy, and physical attributes of the three dressings were evaluated. No statistical significance was found in wound healing rate among the three treatments. Hydrogel sheets were advantageous in allowing wound visualization without dressing or wound disruption.     

Systematic review of economic evaluations of smoking cessation: standardizing the cost-effectiveness.

OBJECTIVES: This study was performed to render cost-effectiveness studies on smoking cessation therapies, utilized until now, more comparable and more useful for medical decision making. METHODS: The cost-effectiveness ratios reported by the studies were recalculated using a societal perspective and guidelines for economic evaluation. RESULTS: The costs of individual interventions generally increased as a result of the standardization procedure, whereas the effect size decreased. This resulted in increases in the cost-effectiveness ratios for individual studies ranging from 120% to 5600%. CONCLUSIONS: The variation between studies in the percentage increase in cost-effectiveness ratios is huge. This means that not following guidelines when calculating cost-effectiveness ratios can result in large errors. Despite the fact that the standardized cost-effectiveness ratios of smoking interventions were higher than the unstandardized cost-effectiveness ratios, interventions aimed at reducing the prevalence of smoking are cost-effective.