flowchart TB MA["MACRO — society, national policy,<br/>global networks, environment, economy"] ME["MESO — communities, families,<br/>institutions, social groups"] MI["MICRO — the individual"] MA --> ME --> MI
Understanding the ‘why’ and ‘how’ behind health and behaviour
Dept of Community and Family Medicine, AIIMS, Bibinagar
2026-06-09
You run a free hypertension clinic. Your data show:
The numbers tell you what is happening. They do not tell you why patients stop their tablets.
Quantitative asks
Qualitative asks
Healthcare research can be classified in several overlapping ways:
By purpose
By data & logic
By field
| Family | Core question | Typical designs |
|---|---|---|
| Quantitative | How many? How strong? | RCT, cohort, survey |
| Qualitative | Why? How? What meaning? | Interviews, FGDs, ethnography |
| Mixed methods | Both — numbers and meaning | Sequential / concurrent designs |
Why do people fall ill, seek care, or refuse treatment? The answers lie across many disciplines:
Social structures and inequalities — the social determinants of health. How does caste or class shape access to care?
Culture, belief and meaning — the difference between disease (biology) and illness (lived experience). What does “fever” mean in this community?
Power, policy and resources — who decides, and who benefits. Why is health spending distributed the way it is?
How diseases, institutions and ideas evolved over time. How did TB become a stigmatised disease?
Behaviour, cognition, emotion and coping. Why do people delay seeking help for symptoms?
Take the example of TB:
| Lens | The question it asks |
|---|---|
| Biomedical | Is the regimen adequate? Drug resistance? |
| Psychological | Does the patient feel better and stop early? |
| Sociological | Do stigma or poverty drive dropout? |
| Anthropological | What does taking medicines mean to them? |
| Political / policy | Are services truly accessible and free? |
flowchart TB MA["MACRO — society, national policy,<br/>global networks, environment, economy"] ME["MESO — communities, families,<br/>institutions, social groups"] MI["MICRO — the individual"] MA --> ME --> MI
The same problem raises different questions at each level
Micro · individual
Meso · groups
Macro · structure
A systematic, naturalistic inquiry that seeks to understand phenomena in their real-world setting, using non-numerical data (words, images, observations) to explore meaning, experience and social processes.
Study people in their real-world settings, not artificial labs: behaviour and talk in their natural context.
The researcher is part of the research. We reflect on how our presence, identity and assumptions shape the data we get.
We care how people interpret and make sense of their world: their own words, categories and explanations.
Designs are emergent and iterative: questions and sampling adapt as understanding grows, rather than being fixed at the start.
We question the taken-for-granted — power, inequality, and whose voice gets heard or silenced.
Done first, to map an unfamiliar area and generate hypotheses, items or tools for a later survey or trial.
Done with or after quantitative work to add depth : explaining why the numbers came out the way they did.
A complete study in its own right, answering questions side-by-side.
| Feature | Quantitative | Qualitative |
|---|---|---|
| Question | How many? How much? | Why? How? What meaning? |
| Data | Numbers | Words, images, observation |
| Reasoning | Deductive (test theory) | Inductive (build theory) |
| Sampling | Large, random, representative | Small, purposive, information-rich |
| Sample size | Powered by statistics | Decided by saturation |
| Analysis | Statistical | Thematic / interpretive |
| Output | Prevalence, RR, p-values | Themes, narratives, models |
| Generalises to | Population (statistical) | Concepts / settings (analytic) |
A measles vaccination drive misses its target
Two words students often confuse:
Methodology / approach
Method
Important
One approach can use several methods. Choose the approach to fit your question, then pick methods to suit.
Studies the lived experience of a phenomenon.
“What is it like to live with newly diagnosed diabetes?”
Builds a theory grounded in data through iterative coding.
“How do families decide to seek care for a sick newborn?”
Immersive study of a culture or group in its natural setting. “Health-seeking practices in a tribal village over 6 months.”
In-depth study of a bounded case (a clinic, an outbreak, a person).
“How did one PHC achieve 95% institutional delivery?”
Analyses the stories people tell about their lives/illness.
“Illness narratives of TB survivors.”
| Approach | Focus | Typical method | Output |
|---|---|---|---|
| Phenomenology | Lived experience | In-depth interviews | Essence of an experience |
| Grounded theory | Social process | Interviews + constant comparison | A theory |
| Ethnography | Culture | Participant observation | Cultural account |
| Case study | A bounded case | Multiple sources | In-depth case account |
| Narrative | Stories | Biographical interviews | Narrative analysis |
Myth: It’s just anecdotes and opinion.
Reality: It is systematic and transparent: explicit methods, an audit trail and quality criteria (trustworthiness). A different logic from experiments, but rigorous all the same.
Myth: It just gives one person’s biased view.
Reality: Subjectivity is acknowledged and managed : through reflexivity, triangulation and team analysis. The aim is a credible, well-grounded interpretation, not a single “fact.”
Myth: It doesn’t inform practice or policy.
Reality: It shapes guidelines and policy (WHO and NICE use qualitative evidence syntheses), explains why interventions succeed or fail, and centres the patient and community voice.
We deliberately select people who can give the richest information.
Common strategies
Important
Saturation decides the sample size.
We stop interviewing when no new themes emerge: typically after ~8–15 rich interviews, but it varies.
| Method | Best for | Typical size |
|---|---|---|
| In-depth interview (IDI) | Personal, sensitive experiences | 1 person |
| Focus group discussion (FGD) | Group norms, shared views, debate | 6–10 people |
| Participant observation | What people do vs say | A setting |
| Document / media analysis | Records, policies, social media | — |
flowchart LR A[Transcripts] --> B[Codes<br/>label segments] B --> C[Categories<br/>group similar codes] C --> D[Themes<br/>patterns of meaning] D --> E[Interpretation<br/>answer the question]
This is iterative: you move back and forth, not in a straight line.
“I stop the tablets when I feel fine. Buying them every month is hard when there’s no work, and the clinic is only open when I’m at the market.”
| Quote segment | Code |
|---|---|
| “stop the tablets when I feel fine” | Symptom-based adherence |
| “Buying them every month is hard… no work” | Cost / livelihood barrier |
| “clinic only open when I’m at the market” | Access / timing barrier |