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Biomedical subjects

H Rhee

Publications and source records attributed to H Rhee.

41 records · Page 3Linked to original sources
PubMedDate not supplied

Prevalence and predictors of headaches in US adolescents.

OBJECTIVES: To examine the prevalence of headaches among US adolescents; to explore the differences in prevalence by sex, race, and age; and to test the nature of the association between headaches and depression, self-esteem, and insomnia. METHODS: This longitudinal study used a nationally representative sample of adolescents (n = 6072) who were interviewed in 1995 (wave 1) and then interviewed a year later in 1996 (wave 2). Path analyses were used to test for the relationships among headaches, insomnia, depression, and self-esteem. RESULTS: More than 90% of subjects had experienced one or more headaches during the past 12 months. Of that 90%, about 30% reported recurrent headaches occurring weekly or more frequently. Girls tended to report more recurrent headaches (37.6%) than boys (21.3%). American Indians experienced the highest rate (35. 6%) of recurrent headaches followed by white adolescents (32.1%). Depression and low self-esteem in wave 1 were found to precede the headaches in wave 2 in girls, but not in boys. No causal relationship was found between insomnia and headaches. CONCLUSIONS: Headaches are prevalent among US adolescents, especially in girls and American Indians. This study suggests the existence of different paths involving different factors in headache-presenting behavior for boys and girls. Further studies are needed to illustrate the different mechanisms of headache in the two sexes.

Adolescent↗
PubMedDate not supplied

Raman crystal lasers in the visible and near-infrared.

Raman lasers based on potassium gadolinium tungstate and lead tungstate crystals pumped by a to approximately 120 ps Nd: YAG laser at 1.064 microm were developed. High reflection mirrors for the Stokes wavelength have been used to generate near-infrared and eye safe spectral region of 1.15 - 1.32 microm. Second harmonic generation of the generated Raman lasers was observed. Eifficient multiple Stokes and anti-Stokes picosecond generation in 64 crystals have been shown to exhibit stimulated Raman scattering on about 700 lines covering the whole visible and near-infrared spectrum. All stimulated Raman scattering (SRS) wavelengths in the visible and near-infrared spectrum are identified and attributed to the SRS-active vibration modes of these crystals.

Crystallization↗
PubMedDate not supplied

What is the best test to detect prostate cancer?

The data accumulated during screening of these 300 men suggest that the digital rectal examination is the most efficient test for the diagnosis of prostate cancer. This test is universally available, because physicians believe that it should routinely be performed as part of the physical examination of every man, particularly for men over the age of 40. The digital rectal examination provides useful clinical information about the rectum, anal sphincter, and the quality of stool. Its diagnostic accuracy is unexcelled by more recent, complex, and expensive tests. Finally, in this age of escalating medical costs and physician accountability for these costs, you can't beat the price of the digital rectal examination.

Humans↗