Search

Study Objective To evaluate the change in mentee self-efficacy with regard to research, number of grant submissions, and total amount of new monies awarded to graduates of a novel, mentored, investigator-training program—the Focused Investigator Training (FIT) Program. Design Retrospective observational analysis. Setting American College of Clinical Pharmacy Research Institute. Participants Fifty-five mentees from the 2008, 2009, 2010, and 2011 FIT Programs. Intervention The FIT Program is a novel, intensive, 5-day, mentored development “boot camp” for mid-career investigators holding research-intensive positions. The program consists of proposal groups of two mentors and two–four mentees, one-on-one office hours, lectures, panel discussions, directed readings, and small group sessions. Twelve highly successful researchers and biostatisticians were recruited as mentors. Mentees submitted a detailed proposal and received faculty feedback before the program. Measurements and Main Results The main outcomes of the FIT Program were mentee self-efficacy with regard to research, number of grant submissions, and total amount of new monies awarded to 2008 and 2009 FIT Program graduates. Univariate statistical analysis was conducted to determine characteristics of those FIT attendees with subsequent successful grantsmanship. A combined measure of self-confidence in successful grantsmanship was significantly increased after completion of the FIT program. More than $2.7 million was funded to FIT graduates as principal investigators, and as coinvestigators or subcontractors, an additional $382,000 was awarded in new funds. Seven mentees from the 2008 and 2009 classes received new federal funding, mostly through various K-type award mechanisms. Conclusion The FIT Program was associated with a significant increase in attendees' self-efficacy for obtaining external research funding. Program attendance was associated with numerous successfully funded grants by pharmacist investigators. Future FIT Program success hinges on attracting adequate numbers of qualified applicants.

Healthy men (n = 22) and women (n = 24), 40-60 years of age, were exposed all-night (23:00-07:00 hr) to 60-Hz magnetic fields at an intensity (resultant flux density = 28.3 microTesla [microT]) well within the occupational-exposure range, or sham exposed under equivalent, counter-balanced, no-exposure ( < or = 0.2 microT) control conditions. Concentrations of melatonin, and the major metabolite of melatonin, 6-hydroxymelatonin-sulfate (6-OHMS), in first-void morning urine were not altered in either gender by exposure to the magnetic field, compared to control conditions. Statistical analysis also failed to reveal any evidence for exposure-related alterations in blood concentrations of multiple hematologic and immune system parameters (CD3, CD4, CD8, natural killer [NK] cells). The present results replicate and extend earlier negative findings based on the exposure of young men to power-frequency magnetic fields.

We determined if all-night exposure to 60 Hz magnetic fields at an intensity well within the upper range of occupational exposures (resultant intensity = 127.3 microTesla [muT]) resulted in suppression of melatonin or its major metabolite 6-hydroxymelatonin-sulfate (6-OHMS) in the first-void morning urine of 24 healthy male volunteers. Measures collected after continuous and intermittent magnetic field exposure test conditions were compared to similar measures collected after an equivalent no-exposure control condition. Urinary concentrations of melatonin and 6-OHMS did not differ as a function of type of magnetic field exposure, nor did they differ between field exposure and control conditions. These results demonstrate that the nocturnal secretion and metabolism of melatonin are not altered in humans by field exposure at an intensity over 600 times higher than that typically encountered in the home.

Magnetic field-induced suppression of nocturnal melatonin in humans has been reported in occupational and residential studies, but not in laboratory-based exposure studies. The present study examined whether this contrasting pattern of results might be related to associated differences in exposure duration or to field-induced measurement instability over time. Thirty healthy young men were evaluated using a randomized, double-blind test protocol. Statistical analysis indicated that 4 consecutive nights of exposure to power-frequency magnetic fields at occupational intensity (resultant flux density = 28.3 microtesla, muT, [283 milligauss, mG]) had no differential effect on concentrations of melatonin or its major enzymatic metabolite (6-hydroxymelatonin sulfate, 6-OHMS) in daily morning urine samples, compared to equivalent no-exposure sham control conditions. The consistency of intra-individual urinary measurements over the 4 test nights also was quite high (P < 0.01) in the sham control condition. In contrast, repeated nightly exposure to the magnetic field was associated with reduced consistency. Morning urinary measures obtained after exposure on night 4 differed (P < 0.01) from similar measures obtained after the second and third exposure night. Thus, while the overall results of this study do not support the melatonin hypothesis, there is some suggestion of a possible cumulative effect of magnetic field exposure on the stability of individual melatonin measurements over time. Additional research with longer periods of controlled exposure may be warranted.

Clinical and epidemiological studies attest that alterations in heart rate variability (HRV) are predictive of specific types of cardiovascular morbidity and mortality in otherwise healthy persons. Recent reports also suggest that changes in HRV may be associated with exposure to intermittent magnetic fields (60 Hz, 28.3 microT) in the laboratory and that mortality is increased in cardiac disease categories related to altered HRV for utility workers whose jobs involve longer exposure to elevated magnetic fields. This study combined three approaches to learn more about the specific exposure circumstances under which changes in HRV occur. First, cardiac autonomic control, as indexed by HRV spectral analysis measures, was measured in 24 men during exposure to a much higher intensity field than any previously examined (resultant flux density = 127.3 microT [1273 milliGauss, mG]). Second, HRV measures from the same individual were compared across three relevant test conditions: intermittent and continuous field exposure and during a no-exposure, control condition. Third, electrocardiographic data were analyzed to determine if the precise timing of when the magnetic field switched on or off in relation to the cardiac cycle results in phase-resetting of the human cardiac rhythm. HRV measures were not altered by either field exposure condition compared to the control condition, and no evidence for a phase-resetting mechanism was found. Further research is needed to resolve the differences between the present and the earlier laboratory-based studies of HRV and to determine if cardiac rhythm disturbances are associated with exposure to the more complex magnetic fields found in the man-made environment.

Coping is important for success at smoking cessation, yet little is known about the natural history of coping with urges to smoke during a cessation attempt. In this study, Ecological Momentary Assessment (EMA) methods were used to gather real-time quantitative and qualitative data. For 3 consecutive days during their first 10 days of smoking cessation, 36 participants used tape recorders and palm-top computers to record details of 389 coping episodes, during which they employed 1,047 coping responses. An average of 3.6 coping episodes per day and an average of 2.7 coping responses per episode were reported. Sixty-seven percent of the responses were behavioral and 33% were cognitive. Gender, location of the episode, nicotine dependence, and quitting history were associated with the use of specific strategies. Results indicate that EMA methods and instruments are feasible for measuring coping responses.

Two double-blind laboratory-based studies were performed to determine whether a suppression of nocturnal melatonin similar to that observed in rodents occurs when humans are exposed to magnetic fields at night. In study 1, 33 men were exposed to sham, 10 mG, or 200 mG intermittent, circularly polarized magnetic fields from 2300 to 0700 h under controlled environmental and exposure test conditions. Overall, exposure had no effect on melatonin levels. Men with preexisting low levels of melatonin, however, showed significantly greater suppression of melatonin when they were exposed to light and also when they were exposed to the 200 mG magnetic-field condition. Study 2 directly tested the hypothesis that low-melatonin subjects show enhanced sensitivity when exposed to light and to 200 mG magnetic fields. After preexposure screening, each of 40 men slept in the exposure facility on two nights. On one night, the men were sham exposed. On the other night, they were exposed to the 200 mG field condition used previously. Again, exposure had no overall effect on melatonin levels. The original finding of enhanced sensitivity in low-melatonin subjects was not replicated in this study. We conclude that the intermittent exposure conditions used in these two studies were not effective in altering nocturnal melatonin release patterns in human volunteers. Further research is underway with regard to exposure parameters, hormonal and immune system measures, and individual differences.