Imprecision when using measuring cups to weigh out extruded dry kibbled food.

Many pet cats and dogs are fed dry extruded kibbled food by measuring cup, yet the precision and accuracy of this feeding strategy is not known. Over 12 studies, we assessed precision and accuracy of weighing out food portions, of various dry kibbled foods, by measuring cup. Poor precision was noted in all studies, with intra- and inter-subject coefficients of variation ranging from 2 to 13% and 2 to 28% respectively. Variable accuracy was also noted, which ranged from an 18% under-estimate to an 80% over-estimate in portion size. No specific factors were associated with imprecision, but the degree of inaccuracy was negatively associated with portion size (R = -0.67, p = 0.022), and positively associated with the number of subjects participating in the study (R = 0.60, p = 0.048). This is the first study to document imprecision and inaccuracy of using measuring cups to estimate portions of extruded dry kibbled food. Over time, such errors could contribute to insidious weight gain in companion animals, potentially contributing to the development of obesity. Imprecision in measuring food portions could also contribute to failure of weight management programmes for obese animals.

Learning as a function of lecture length.

BACKGROUND: The purpose of this study was to compare the learning of family practice residents after lectures of differing lengths (either 20 or 50 minutes' duration). Immediate and delayed recall were measured by written quizzes administered at the conclusion of each lecture and 2 weeks later. METHODS: A total of 390 quizzes, 220 immediate and 170 delayed, were completed by residents from all three year groups attending didactic lectures as part of the regular training program curriculum at Naval Hospital Jacksonville. The completed quizzes were divided almost equally between 20- and 50-minute lectures. RESULTS: No significant difference was found when the Student's t test was used to compare the quiz scores following the contrasting lecture lengths at either the immediate post-lecture period (P = .294) or 2 weeks later (P = .5443). CONCLUSION: This study shows that a 20-minute lecture was equal to the classic 50-minute lecture in terms of information retained by residents. If future studies confirm this study's findings, medical educators will need to reevaluate the length of lectures to improve efficiency of teaching.

Recurrent toxic shock syndrome.

While the classic manifestations of toxic shock syndrome in a high-risk patient are readily recognized, probable cases of the syndrome are often overlooked. This is especially true of nonmenstrual toxic shock syndrome, which may be associated with a variety of clinical conditions. There is a 30 percent risk of recurrence following the first episode of toxic shock. The roles of prophylactic antibiotics and oral contraceptives in reducing recurrences require further study.

Children of divorce.

BACKGROUND: The rapidly changing nature and demographics of divorce in United States within the past 30 years has spawned an epidemic that affects more than one half of the families in the United States. METHODS: I performed a MEDLINE-assisted review of the medical literature searching with the key words "divorce" and "children." In addition, a Web search was conducted using Webferret with the same key words. RESULTS AND CONCLUSIONS: The past view of divorce as a short-term family crisis must mature into a longitudinal view of the effects of divorce. Divorce affects children according to their coping mechanisms in their own stages of development. Many problems and concerns previously attributed to divorce have their roots in the period of family interaction before the divorce and in the ongoing conflicts in many families after the divorce itself. Because family physicians are objective observers with whom the family comes into regular contact, they must be able to assist families through the transitions of divorce and to intervene on behalf of the children to help them through this stressful life event with the fewest detrimental effects possible. Counseling, group therapy, and divorce mediation have been assessed as effective tools for intervention.