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The condition newly affects about one in a million children per year. [2] Onset is generally in children between the ages of 2 and 17. [1] Males appear to be more commonly affected than females. [2] Cases consistent with the condition were first described in 1961, with the current name coming into use in 2010. [5]
Examples of statements include "feels he or she is bad", "teases others", and "is distracted easily". The questionnaire takes 3–5 minutes to complete. [4] The original study of the PSC focused on children between 6 and 12 years old, but the checklist has been studied and validated in all age groups between 4 and 16 years. [5] [6] [7]
Medical symptoms refer to the manifestations or indications of a disease or condition, perceived and complained about by the patient. [ 1 ] [ 2 ] Patients observe these symptoms and seek medical advice from healthcare professionals.
Numbering the cylinders in each bank sequentially (e.g. 1-2-3-4 along the left bank and 5-6-7-8 along the right bank). This approach is typically used by V8 engines from Audi, Ford and Porsche. [2] Numbering the cylinders based on their position along the crankshaft (e.g. 1-3-5-7 along the right bank and 2-4-6-8 along the left bank).
A medical triad is a group of three signs or symptoms, the result of injury to three organs, which characterise a specific medical condition. The appearance of all three signs conjoined together in another patient, points to that the patient has the same medical condition, or diagnosis.
Excessive hammer blow from high slipping speeds was a cause of kinked rails with new North American 4–6–4s and 4–8–4s that followed the 1934 A.A.R. recommendation to balance 40% of the reciprocating weight. [8] Out-of-balance inertia forces in the wheel can cause different vertical oscillations depending on the track stiffness.
[3] Pre-ignition and engine knock both sharply increase combustion chamber temperatures. Consequently, either effect increases the likelihood of the other effect occurring, and both can produce similar effects from the operator's perspective, such as rough engine operation or loss of performance due to operational intervention by a powertrain ...
The study, which compared visual acuity diagnoses from Lea symbols tests to those obtained via ophthalmological examination, revealed that the Lea symbols chart provided an accurate and sufficient assessment in 95.9% of the 149 preschool-age children tested. This suggests that Lea tests can be used confidently as an alternative to more costly ...