Clinical Deep Dives

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes steps into the subtle terrain between rational theory and real human behaviour. Traditional economics assumes that individuals make rational decisions to maximise benefit. Behavioural economics challenges this assumption. People are influenced by cognitive biases, heuristics, f...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes steps into the chamber of decision-making where evidence meets constraint. Public health operates under limited budgets, competing priorities, and ethical trade-offs. Economic appraisal provides the structured tools to guide those choices. Holmes introduces the core approaches...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes confronts a reality of modern public health: most meaningful interventions are not single actions, but interconnected systems of change. A vaccination is simple. A health system reform is not. Reducing obesity, improving mental health, tackling health inequalities - these requi...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes moves from measuring populations to mobilising them. Health promotion is not simply about delivering information - it is about enabling people to improve and sustain their wellbeing. Holmes begins by revisiting the foundational principles of modern health promotion, including t...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes turns his attention to the architecture of populations. Demography is the study of population size, structure, and change - and it underpins nearly every public health decision. Holmes begins with the core components of demographic change: * Fertility * Mortality * Migration We...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes approaches one of the most sensitive and socially complex domains of public health: sexuality. Sexual health is not merely the absence of disease. It encompasses physical wellbeing, psychological safety, consent, reproductive autonomy, identity, and human rights. Holmes explore...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes turns his attention from pathogens and probabilities to people and power. Public health is not solely biological - it is deeply social and psychological. We explore how sociology examines the structures that shape health: social class, inequality, institutions, norms, culture,...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes steps away from snapshots of disease and instead examines the long arc of health across an entire lifetime. Life course epidemiology asks a transformative question: How do exposures at different stages of life influence later health outcomes? Health is not merely the product of...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes shifts from prediction to vigilance. Public health surveillance is not passive data collection - it is structured, continuous, systematic observation designed to trigger action. Holmes begins by defining surveillance in its modern sense: the ongoing collection, analysis, interp...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes enters the world of dynamic systems - where infections move not randomly, but according to patterns that can be described, simulated, and sometimes predicted. Mathematical modelling of infectious disease seeks to answer urgent questions:How fast will an outbreak grow? When will...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes steps onto a global stage. Instead of a single outbreak or local study, we now examine the health of entire populations - across countries, decades, and causes. The Global Burden of Disease (GBD) framework was developed to answer a profound question: How do we compare the impac...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes enters the engine room of epidemiology: statistical reasoning. Behind every risk ratio, confidence interval, and p-value lies a framework of probability, estimation, and uncertainty. Holmes begins by revisiting foundational concepts - populations and samples, distributions, mea...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes turns from individual studies to the architecture of accumulated evidence. One study may suggest. Several may hint. But how do we know when the totality of research points decisively in one direction? We explore the principles of systematic reviews - structured, transparent, re...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com In this episode, Medlock Holmes steps into one of the most fundamental questions in public health: What does it mean to say that something causes disease? From early infectious disease models and Koch’s postulates to Bradford Hill’s criteria and modern counterfactual reasoning, we unpack how causal thinking h...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com Every epidemiological finding must answer a deeper question: is it true? This chapter examines the foundations of validity in epidemiological research. It distinguishes between random error and systematic error, and it dissects the principal forms of bias that threaten inference. We explore: * Internal validi...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com Genetic epidemiology examines how genetic variation contributes to disease patterns within populations. This chapter explores the methods used to identify inherited risk factors and gene–environment interactions. It bridges molecular biology and epidemiology, applying population-based designs to questions of...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com Clinical epidemiology bridges two worlds: population science and individual patient care. This chapter explores how epidemiological principles are applied to improve diagnosis, prognosis, and treatment decisions in clinical settings. We examine: * Measures of diagnostic accuracy (sensitivity, specificity) * P...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com Community-based intervention trials in low- and middle-income countries (LMICs) operate within contexts of limited infrastructure, variable resources, and diverse cultural settings. This chapter explores how large-scale public health interventions are designed and evaluated when formal health systems may be f...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com Community intervention trials in high-income countries often operate within structured health systems, established institutions, and robust regulatory frameworks. This chapter examines how large-scale public health strategies are designed, implemented, and evaluated in these settings. We explore classic and c...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com Some public health interventions cannot be delivered to individuals in isolation. Vaccination campaigns, water fluoridation, health promotion strategies, school-based programmes, and environmental modifications operate at the level of communities. This chapter explores the methodological challenges of communi...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com Observational studies suggest associations. Intervention trials test them. This chapter examines the methodology of individual-level intervention trials - most notably the randomised controlled trial (RCT), often regarded as the gold standard for evaluating effectiveness. We explore the core components of tri...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com If case–control studies look backward from outcome to exposure, cohort studies begin with exposure and move forward in time to observe outcome. This chapter explores the structure and analytic power of cohort designs. A cohort study identifies groups based on exposure status and follows them prospectively - o...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com Case–control studies reverse the usual direction of inquiry. Instead of following exposed individuals forward in time, we begin with those who already have the outcome (cases) and compare them to those who do not (controls). We then look backward to assess prior exposure. This chapter explores the design, str...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com An outbreak transforms epidemiology from analysis into action. This chapter outlines the structured approach to investigating suspected outbreaks - a disciplined sequence designed to identify the source, interrupt transmission, and prevent recurrence. We walk through the classic steps: * Confirm the existence...

This is a free preview of a paid episode. To hear more, visit drmanaankarray.substack.com Cross-sectional studies capture populations at a specific point in time. They measure exposure and outcome simultaneously, offering a “snapshot” of health status. This chapter explores the design, utility, and limitations of cross-sectional analysis. These studies are foundational for: * Estimating prevalence...