One lumbar extension training session per week is sufficient for strength gains and reductions in pain in patients with chronic low back pain ergonomics.

Unlabelled: Chronic low back pain (CLBP) is the leading cause of absenteeism from the workplace and research into exercise interventions to address this problem is required. This study investigated training frequency for participants with CLBP. Participants either trained once a week (1 × week, n = 31), or twice a week (2 × week, n = 20) or did not (control group, n = 21).

The effect of lumbar extension training with and without pelvic stabilization on lumbar strength and low back pain.

Introduction: A dynamometer employing a stabilization procedure (lumbar extension machine, MedX, Ocala, FL) is effective in improving strength and reducing symptoms of low back pain (LBP), and researchers have hypothesized that this effectiveness is due to the pelvic stabilization. However, effects of the dynamometer with and without pelvic stabilization on LBP have not been compared: This was the aim of the present study.

Methods: Forty-two chronic LBP patients were randomly assigned to a lumbar extension training with pelvic stabilization group (STAB; n=15), a lumbar extension without pelvic stabilization group (NO-STAB; n=15) and a control group (n=12).

The dentist-patient relationship: perceived dentist behaviors that reduce patient anxiety and increase satisfaction.

This study relates perceived dentist behaviors to anxiety reduction in patients during treatment, and to satisfaction with the dental visit. The sample consisted of 250 adult patients, 110 men and 140 women, at two outpatient hospital dental clinics. Immediately after treatment, patients were asked to respond to a list of 25 dentist behaviors thought to be associated with positive dentist-patient interaction.

The dentist-patient relationship: mutual perceptions and behaviors.

The relationship between patients' characteristics and dentists' perceptions as well as the associations between these dimensions and specific dentist behaviors as perceived by patients are explored. Dentist perceptions of patient sophistication and anxiety were related to several patient characteristics, but perceptions of patient likability were unrelated to patient personal and social characteristics. Perceptions of patient likability were associated with more specific dentist behaviors than were other dentist perceptions noted by patients.

The dentist-patient relationship: perceptions by patients of dentist behavior in relation to satisfaction and anxiety.

This study relates perceived dentist behaviors to anxiety in patients during treatment and to satisfaction during the dental visit. The sample consisted of 231 adult patients, 107 men and 124 women, at a public hospital dental clinic. Immediately after treatment, patients were asked to respond to a list of 21 dentist behaviors thought to be associated with positive dentist-patient interaction.

Some factors affecting the utility of bovine blood as a control material in lead-screening programs.

Bovine blood is used frequently as control material in interlaboratory comparisons for blood-lead analysis, but an erythrocyte protoporphyrin control material is needed. We present data on the rate of changes in blood lead and erythrocyte protoporphyrin in steers fed lead acetate. We also show, by comparison of fluorescence spectra with those of known compounds, that most of the porphyrin in lead-burdened steers probably exists as free protoporphyrin IX along with some zinc-complexed protoporphyrin IX.

Effect of perceived control on stress reduction in adult dental patients.

A signaling device was given to adult patients to reduce stress in the dental chair. Galvanic skin response during the dental procedures indicated that patients with the signaling device showed more arousal during high stress conditions when compared with a control group. A personality variable was also investigated.

Effects of DDT on reproduction in multiple generations of beagle dogs.

The effects of chronic oral exposure to 1, 5, and 10 mg of technical DDT/kg/day on: 1) age at puberty, length of gestation, fertility, success of pregnancy, litter size, and lactational ability of dams; 2) viability, survival to weaning, sex distribution and growth of pups; and 3) morbidity, mortality, organ/body weight ratios, gross and histologic abnormalities in all animals were studied through three generations of Beagle dogs. There were a total of 135 adult female and 63 adult male dogs in the project which produced 650 pups. There were no statistically significant differences among control and DDT-treated dogs in any of the reproductive variables, with the exception of age at puberty of the females.

Myxedema ileus. A form of intestinal pseudo-obstruction.

Myxedema ileus uncommonly complicates the hypothyroid state. It is a rare cause of intestinal pseudo-obstruction that can be reversed with thyroid hormone therapy. Our two patients with myxedema ileus had concurrent infection.