Strengths and Difficulties Questionnaire (SDQ) Study Notes
1. Introduction The Strengths and Difficulties Questionnaire (SDQ) is a widely used behavioral screening tool for children and adolescents aged 2–17 years. Developed by Robert Goodman (1997) in the UK, it is designed to assess both positive attributes (strengths) and negative attributes (difficulties). The SDQ is brief (25 items) and available in multiple versions for […]
The NICHQ Vanderbilt Assessment Scales
The NICHQ Vanderbilt Assessment Scales 1. Introduction The NICHQ Vanderbilt Assessment Scales are standardized tools developed by the National Institute for Children’s Health Quality (NICHQ). They are widely used to screen, diagnose, and monitor Attention‑Deficit/Hyperactivity Disorder (ADHD) in children aged 6–12 years, though they can be applied to other age groups with caution. The scales […]
Circle City Food: Sample New Venture and Business Plan Study Notes
1. Introduction to Business Planning A business plan is a structured document that outlines the vision, mission, goals, and operational strategies of a new venture. For food businesses, it serves as a roadmap guiding product development, marketing, financial management, and growth. Circle City Food is presented as a sample case study of how entrepreneurs can […]
Kaplan‑Meier Curve, Life Table, and Log‑Rank (Mantel‑Haenszel) Test Study Notes
1. Introduction Kaplan‑Meier curves, life tables, and log‑rank tests are fundamental tools in survival analysis. They allow visualization and comparison of survival probabilities across groups. 2. Kaplan‑Meier Curve Definition: Non‑parametric estimator of survival function. Method: Calculates probability of survival at each event time. Steps: Order survival times. Calculate survival probability at each event. Plot stepwise […]
Migraine Study Survival Analysis Study Notes
1. Introduction Survival analysis can be applied to migraine research to evaluate time until events such as recurrence, remission, or treatment response. This approach helps clinicians understand treatment efficacy and patient outcomes over time. 2. Research Context Event of Interest: Migraine recurrence, remission, or onset of chronic migraine. Population: Patients diagnosed with episodic or chronic […]