The perception of dyspnea in patients with mild asthma.

BACKGROUND: Airway function, as assessed by standard spirometry, and the intensity of dyspnea reported by asthmatic patients correlate poorly. OBJECTIVE: This study tests the following two hypotheses: (1) that measures of the tendency of a patient to somatize will reduce the variation in the report of dyspnea not explained by airway function; and (2) that plethysmography is a better tool with which to estimate the degree of dyspnea associated with asthma. DESIGN: A prospective laboratory study carried out over one study session. PARTICIPANTS: Forty asthmatic subjects who had withheld bronchodilator (BD) therapy overnight. INTERVENTIONS: We performed spirometry, plethysmography, and an assessment of dyspnea (ie, modified Borg scale) on all subjects before and after they received BD therapy. Standard questionnaires pertaining to psychological state and trait were administered as well. RESULTS: The change in specific airway conductance with BD therapy correlated with a decline in the Borg score (r = 0.47; p = 0.007). By contrast, neither spirographic measures nor measures of static lung volumes correlated. Correlation with the Borg scale score was not improved by adding indexes of either somatization or psychological state or trait. CONCLUSION: The relief of dyspnea reported by patients with mild asthma after BD therapy is related to dilatation of the central airways.

Longitudinal assessment of neuropsychological functioning, psychiatric status, functional disability and employment status in chronic fatigue syndrome.

The longitudinal course of subjective and objective neuropsychological functioning, psychological functioning, disability level, and employment status in chronic fatigue syndrome (CFS) was examined. The relations among several key outcomes at follow-up, as well as the baseline characteristics that predict change (e.g., improvement), were also evaluated. The study sample consisted of 35 individuals who met the 1988 and 1994 CFS case definition criteria of the Centers for Disease Control (CDC) at intake. Participants were evaluated a mean of 41.9 (SEM = 1.7) months following their initial visit (range = 24-63 months). Results indicated that objective and subjective attention abilities, mood, level of fatigue, and disability improve over time in individuals with CFS. Moreover, improvements in these areas were found to be interrelated at follow-up. Finally, psychiatric status, age, and between-test duration were significant predictors of outcome. Overall, the prognosis for CFS appears to be poor, as the majority of participants remained functionally impaired over time and were unemployed at follow-up, despite the noted improvements.

Cognitive functioning in Gulf War Illness.

A comprehensive neuropsychological battery was administered to 48 veterans with Gulf War Illness (GWI) characterized by severe fatigue (GV-F) and 39 healthy veterans (GV-H). Subjects were matched on intelligence and did not differ on age, gender, race, and alcohol consumption. Compared to GVs-H, GVs-F were significantly impaired on four tasks: three attention, concentration, information processing tasks and one measure of abstraction and conceptualization. After considering the presence of post-war Axis I psychopathology, GWI remained a significant predictor of cognitive performance on one of the attention, concentration, and information processing tasks and one abstraction and conceptualization measure. Performance on the remaining two attention, concentration, and information processing tasks was only significantly predicted by Axis I psychopathology with post-war onset. The results suggest that Gulf War Illness is associated with some aspects of cognitive dysfunction in Gulf Veterans, over and above the contribution of psychopathology.

Psychological profile and ventilatory response to inspiratory resistive loading.

The purpose of this study was to explore the contribution of psychological state to both the ventilatory response and the intensity of dyspnea experienced after the addition of small inspiratory loads to breathing. We hypothesized that patients with either a specific psychiatric diagnosis or a specific psychological trait will associate a greater degree of dyspnea with a loaded breathing task than will control subjects. To insure the inclusion of persons with relevant psychological profiles, we recruited both subjects enrolled in the Chronic Fatigue Center and normal control subjects. In all, 52 subjects inspired first through a small (1.34 cm H(2)O/L/s) and second through a moderate (3.54 cm H(2)O/L/s) inspiratory resistive load (IRL). Ventilation was monitored throughout the 5-min sessions. Dyspnea was quantified with the Borg scale at specified times during the protocol. Standard psychological tests were administered. We found that subjects could be divided into two groups. One, the "responders," reported Borg scores higher than those of the second, or "nonresponder" group, at all times during the protocol. By contrast, there was no difference between groups with respect to ventilation. Responders had higher scores on tests of depression (the Center for Epidemiological Study depression scale) than did nonresponders. We conclude that the variability observed in subjective responses to IRL is explained, in part, by differences in psychological state.

Brain MRI abnormalities exist in a subset of patients with chronic fatigue syndrome.

Presence of MRI brain abnormalities in patients with Chronic Fatigue Syndrome (CFS) was determined and the profile of MRI abnormalities was compared between 39 CFS patients, 18 with (CFS-Psych) and 21 without (CFS-No Psych) a DSM-III-R Axis I psychiatric diagnosis since illness onset, and 19 healthy, sedentary controls (HC). Two neuroradiologists, blind to group membership, separately read the MR films using a detailed protocol for rating and categorizing abnormal signal changes. When findings were incongruent, the two neuroradiologists met to try to reach consensus, otherwise a third neuroradiologist evaluated the MR images and served as a tie-breaker. The CFS-No Psych group showed a significantly larger number of brain abnormalities on T2 weighted images than the CFS-Psych and HC groups. Cerebral changes in the CFS-No Psych group consisted mostly of small, punctate, subcortical white matter hyperintensities, found predominantly in the frontal lobes. No significant difference was found when both CFS groups were combined and compared to the HC group. The use of stratification techniques is an important strategy in understanding the pathophysiology of CFS. This frontal lobe pathology could explain the more severe cognitive impairment previously reported in this subset of CFS patients.

Natural history of severe chronic fatigue syndrome.

OBJECTIVE: To evaluate the natural history of chronic fatigue syndrome (CFS) in a severely ill group of patients at three points in time. DESIGN: Patients were enrolled from April 1992 to February 1994 and were evaluated three times. Time 1 (at enrollment): history, physical evaluation, and psychiatric evaluation; Time 2 (median = 1.6yrs after initial evaluation): postal questionnaire to assess current condition; Time 3 (median = 1.8 yrs after Time 2): medical and psychiatric evaluations. SETTING: The New Jersey CFS Cooperative Research Center, an ambulatory setting. PATIENTS: Twenty-three patients fulfilled the 1988 case definition for CFS and had symptom complaints that were substantial or worse in severity. All patients were ill less than 4.5 years; and none had a DSM-III-R psychiatric disorder in the 5 years before illness onset; none had substance abuse in the 10 years before enrollment. MAIN OUTCOME MEASURES: Severity of CFS symptoms was assessed by self-report questionnaires, laboratory tests, and medical examination. Psychological status was assessed using the Q-D15 and the Centers for Epidemiological Study-Depression Scale. At each time of evaluation, patients were categorized as severe, slightly improved, improved, and recovered. RESULTS: Over the 4 years of the study, 13 patients remained severely ill, 9 improved but still fulfilled the 1994 case definition for CFS, and 1 recovered. Illness duration, mode of onset, psychiatric status or depressed mood at intake, or chemical sensitivity did not predict illness outcome. One patient was diagnosed with an alternate illness, but it probably did not explain her CFS symptoms. Mood improved for those patients whose illness lessened. CONCLUSIONS: The prognosis for recovery was extremely poor for the severely ill subset of CFS patients. The majority showed no symptom improvement and only 4% of the patients recovered. Illness severity between Times 2 and 3 remained stable.

Impaired associative learning in chronic fatigue syndrome.

Patients with chronic fatigue syndrome (CFS) report cognitive difficulties (impaired attention, memory and reasoning). Neuropsychological tests have failed to consistently find cognitive impairments to the degree reported by CFS patients. We tested patients with CFS and sedentary controls in protocols designed to measure sensory reactivity and acquisition of the classically conditioned eyeblink response. Patients with CFS exhibited normal sensitivity and responsivity to acoustic stimuli. However, CFS patients displayed impaired acquisition of the eyeblink response using a delayed-type conditioning paradigm. Sensitivity and responsivity to the airpuff stimulus were normal. In the absence of sensory/motor abnormalities, impaired acquisition of the classically conditioned eyeblink response indicates an associative deficit. These data suggest organic brain dysfunction within a defined neural substrate in CFS patients.

Neuropsychology of chronic fatigue syndrome: a critical review.

This article provides a comprehensive and critical review of the neuropsychological and related literature on chronic fatigue syndrome (CFS). Despite the methodological limitations observed in several studies, some consistent findings are noted. The most consistently documented neuropsychological impairments are in the areas of complex information processing speed and efficiency. General intellectual abilities and higher order cognitive skills are intact. Emotional factors influence subjective report of cognitive difficulty, whereas their effect on objective performance remains uncertain. Although the neuropathological processes underlying cognitive dysfunction in CFS are not yet known, preliminary evidence suggests the involvement of cerebral white matter. Directions for future research are outlined.

Attitudes about condoms and condom use among college students.

The authors assessed the relationships of ethnicity, gender, previous condom use, and intended condom use to perceived attributes of the condom and the contraceptive pill in a multiethnic sample of 197 college students. Factors that appeared to underlie attitudes toward the condom and the Pill included prevention of health problems, peer acceptance, sexual pleasure and spontaneity, convenience, embarrassment, and effectiveness in preventing HIV and sexually transmitted diseases. African American participants viewed the condom more positively than did students from other ethnic groups and were more likely to use condoms than White participants were. The African Americans appeared to know less about the characteristics of the Pill and were less likely to use it than were the White respondents. Only 60% of the persons in the student sample had used condoms in the last 6 months, and less than one half definitely intended to use condoms in the next month. Those who had used a condom at their most recent intercourse and those who intended to use a condom in the next month viewed the condom more favorably than others did. Intended condom use was associated with a perception of oral contraceptives as a less convenient method of birth control.

PIP: A survey conducted among 196 sexually active students at three diverse US colleges indicated that attitudes about contraceptive use differed according to ethnicity, with Blacks more likely to be condom users than Whites. The study instrument was the Contraceptive Attributes Questionnaire-2 (CAQ-2), which focuses on condom and oral contraceptive (OC) use. The CAQ-2 is based on the assumption that the decision to use or not use a specific contraceptive method is a function of perceived value, importance, and likelihood. Although 90% of students reported ever-use of condoms, only 60% had used this method in the six months preceding the survey; 48% stated they intended to use condoms in the next month. Among the 83 Black students, however, these rates were 76%, 50%, and 61%, respectively. Black students were more concerned with peer acceptance than White students and believed more strongly in the importance of method convenience. Blacks were more likely than Whites to agree that condoms do not interfere with sexual pleasure. On the other hand, Black students--to a greater degree than Whites--viewed OCs as compromising sexual enjoyment. Overall, students who had used condoms at last intercourse more strongly agreed that this method is acceptable to peers, convenient, not embarrassing to use or discuss with a partner, does not interfere with sexual enjoyment, and is not linked to health concerns. The intent to use condoms in the next month was significantly associated with the belief condoms are a convenient method that does not interfere with sexual pleasure.