Chronotype is a construct reflecting individual differences in diurnal preference. Although chronotype has been studied extensively in school-age children, adolescents and adults, data on young children are scarce. This study describes chronotype and its relationship to the timing of the circadian clock and sleep in 48 healthy children aged 30-36 months (33.4 ± 2.1 months; 24 males). Parents co...

BACKGROUND Sexual and reproductive health (SRH) is a significant aspect of adolescents' growth, safeguarded by SRH rights (SRHR). Despite various global efforts to promote adolescents SRHR (ASRHR), the majority of adolescents still lack awareness and autonomy to access SRH related information and services. This research aimed to explore the knowledge and perceptions of adolescents' sexual and r...

The term pedophilia denotes the erotic preference for prepubescent children. The term hebephilia has been proposed to denote the erotic preference for pubescent children (roughly, ages 11 or 12-14), but it has not become widely used. The present study sought to validate the concept of hebephilia by examining the agreement between self-reported sexual interests and objectively recorded penile re...

PURPOSE To compare the effect of different fragmentation softening grids in femtosecond laser-assisted cataract surgery on effective phacoemulsification time (EPT). SETTING Ruhr University Eye Clinic, Bochum, Germany. DESIGN Prospective randomized clinical trial. METHODS The study evaluated the feasibility of using a femtosecond laser (Catalys Precision Laser System) to perform capsulotom...

The purpose of this investigation was to examine longitudinally gestational age and developmental differences in preterm infants' self-regulatory abilities in response to a painful stressor, as well as associations between behavioral and cardiovascular responses. Participants included 49 healthy premature infants. Behavioral and cardiovascular responses to a heel stick blood draw were compared ...

OBJECTIVE Age disassortativity is one hypothesis for HIV disparities between Black and White MSM. We examined differences in age mixing by race and the effect of partner age difference on the association between race and HIV status. DESIGN We used data from four studies of MSM. Participants reported information about recent sexual partners, including age, race, and sexual behavior. Two studie...

CONTEXT Two-thirds of sexually experienced teenagers in the United States say they wish they had waited longer to have intercourse for the first time. Little is known about why such a large proportion of teenagers express disappointment about the timing of their initial experience with sex. METHODS Data on television viewing, on regret about the timing of first intercourse and on potentially ...

Growing evidence suggests that adolescent mice display differential sensitivity to the acute locomotor activating effects of cocaine as compared to adults, but the direction of the difference varies across studies and the reasons are not clear. Few studies have directly examined genetic contributions to age differences in locomotor stimulation from cocaine. The goal of this study was to determi...

BACKGROUND Being an adolescent mother and cohabiting with the maternal grandmother have been shown to be risk factors for a shorter breastfeeding duration. The objective of this study was to assess whether the positive effects of a pro-breastfeeding intervention aimed at adolescent mothers and maternal grandmothers on the prevalence of breastfeeding observed in the first year of life were maint...

We examined school personnel's engagement in bystander action in situations of teen dating violence (DV), sexual violence (SV), and sexual harassment (SH). We conducted focus groups with 22 school personnel from three high schools in New Hampshire. School personnel identified their own barriers to intervening in situations of teen DV, SV, and SH (e.g., not having the time or ability to interven...