Development of a valid and reliable instrument for the assessment of quality of life in parents of children with clefts.

PURPOSE: Orofacial clefts are the most common congenital malformations that affect craniofacial structures. Studies show that they have a major influence on psychological development of the patient, and on their families. A review of the literature showed a lack of specific questionnaires for children and their parents. This study investigated the impact of orofacial clefts in children on the quality of life of their parents. In addition, the results of the treatment and the quality of work of the health team members involved in this process were evaluated. MATERIALS AND METHODS: For the purpose of this study, an original questionnaire was made to analyse the effect of orofacial clefts in children who had undergone surgery on the quality of life of 73 of their parents. The questionnaire consisted of 28 simple statements, which were evaluated with a 5-degree Likert scale (from 1-fully disagree to 5-fully agree), did not require any specific additional clarification, and were easy to complete. RESULTS: Analysis of areas of the questionnaire that applied to the parents, resulted in two subscales, parental social health and child social health, which had satisfactory Cronbach's coefficients (0.907 and 0.897, respectively). However, some issues had a relatively poor coefficient of internal consistency, which justified their expulsion from the final model of the parent questionnaire. CONCLUSION: The questionnaire developed for this study comprised two subscales concerned with the social health of parents/respondents and the social health of adolescents, as perceived by the parents. It was a valid and reliable instrument, and it showed satisfactory quality of life for parents of adolescents with clefts.

COMETARY SCIENCE. The structure of the regolith on 67P/Churyumov-Gerasimenko from ROLIS descent imaging.

The structure of the upper layer of a comet is a product of its surface activity. The Rosetta Lander Imaging System (ROLIS) on board Philae acquired close-range images of the Agilkia site during its descent onto comet 67P/Churyumov-Gerasimenko. These images reveal a photometrically uniform surface covered by regolith composed of debris and blocks ranging in size from centimeters to 5 meters. At the highest resolution of 1 centimeter per pixel, the surface appears granular, with no apparent deposits of unresolved sand-sized particles. The thickness of the regolith varies across the imaged field from 0 to 1 to 2 meters. The presence of aeolian-like features resembling wind tails hints at regolith mobilization and erosion processes. Modeling suggests that abrasion driven by airfall-induced particle "splashing" is responsible for the observed formations.

COMETARY SCIENCE. Thermal and mechanical properties of the near-surface layers of comet 67P/Churyumov-Gerasimenko.

Thermal and mechanical material properties determine comet evolution and even solar system formation because comets are considered remnant volatile-rich planetesimals. Using data from the Multipurpose Sensors for Surface and Sub-Surface Science (MUPUS) instrument package gathered at the Philae landing site Abydos on comet 67P/Churyumov-Gerasimenko, we found the diurnal temperature to vary between 90 and 130 K. The surface emissivity was 0.97, and the local thermal inertia was 85 ± 35 J m(-2) K(-1)s(-1/2). The MUPUS thermal probe did not fully penetrate the near-surface layers, suggesting a local resistance of the ground to penetration of >4 megapascals, equivalent to >2 megapascal uniaxial compressive strength. A sintered near-surface microporous dust-ice layer with a porosity of 30 to 65% is consistent with the data.