Exhaustive Academic Study Guide: Public Health Nutrition and Program Planning (copy)

Fundamentals and Practice of Community and Public Health Nutrition

  • Community Nutrition: The utilization of nutrition knowledge for promoting the nutritional well-being of individuals and groups within community life. It focuses on controlling environmental factors through organized community action.

  • Public Health Nutrition (PHN): defined by Hughes & Somerset (1997) as the art and science of promoting population health via sustainable improvements in the food and nutrition system. It emphasizes population-level primary prevention of diet-related illness and the fulfillment of the human right to adequate food.

  • Key Comparisons:

    • Focus: Both focus on population issues rather than individual dietary needs.

    • Target Population: Community nutrition is often circumscribed to a local, homogenous level, whereas PHN includes a wide spectrum of people and needs.

    • Supervision: PHN practitioners often design and manage programs and may supervise community nutritionists.

    • Employment: PHN are typically employed at federal, state, or city levels, while community nutritionists are often found at city/county levels or in non-profits.

  • Functions of a Public Health Nutritionist:

    1. Assessor: Identifies community problems and helps people understand their condition.

    2. Community Organizer: Discovers potential leaders and initiates organizational development.

    3. Program Planner: Prioritizes problems and plans solutions.

    4. Implementer: Guides people toward self-reliance and behavioral change.

    5. Nutrition Educator: Acts as a counselor, group facilitator, and translator of research findings.

    6. Researcher: Plans and conducts demographic and epidemiological studies.

    7. Program Administrator: Recruits personnel and manages budgets/facilities.

    8. Program Evaluator: Assesses the success or failure of activities.

Public Health Nutrition Milestones in the Philippines

  • Spanish Regime:

    • 1577: Father Juan Clemente set up a dispensary for indigents (later San Juan de Dios Hospital).

    • 1876: First medical school at the University of Santo Tomas founded.

    • 1879: Construction of Carriedo waterworks for piped water in Manila.

  • American Regime (1898–1936):

    • 1912: Recognizing beriberi was associated with white polished rice; first nutrition survey released.

    • 1914: Discovery of tiqui-tiqui extract for beriberi treatment and laws for free distribution to indigent mothers.

    • 1934: Organization of the National Research Council.

  • Post-World War II to Present:

    • 1947: Created the Philippine Institute of Nutrition (PIN) with Dr. Juan Salcedo, Jr. as first director.

    • 1948: The Bataan Rice Enrichment Project became a landmark in national public health.

    • 1958: PIN reorganized as the Food and Nutrition Research Center (FNRC), later FNRI.

    • 1974: Presidential Decree (PD) 491 (Nutrition Act of the Philippines) created the National Nutrition Council (NNC) and designated July as Nutrition Month.

    • 1977: PD 1286 required hospitals and local health units to hire licensed Nutritionist-Dietitians.

    • 1978: PD 1569 provided for one Barangay Nutrition Scholar (BNS) per barangay.

    • 2016: RA 10862 (Nutrition and Dietetics Law of 2016) enacted to regulate professional practice.

Ethics and Professionalism in Public Health Nutrition

  • Competencies (CMO 54, s.2006): Must identify problems, plan/implement/monitor programs, participate in advocacy, and carry out tasks in an ethical manner with maturity.

  • Sound Professional Ethics:

    • Pleasing Personality: self-control, fairness, and effective communication.

    • Good Human Relations: Tact, listening more than talking, and avoiding petty arguments.

  • Basic Research Ethics Principles:

    1. Respect for Persons: Regarding people as ends in themselves and protecting rights to autonomy.

    2. Beneficence: To "do good" and remove harm.

    3. Non-maleficence: "Do no harm"; ensuring benefits outweigh risks.

    4. Justice: Fairness in interactions and ensuring stakeholders receive due benefits.

  • Code of Ethics Responsibilities:

    • To the Public: Protect against false food endorsements; practice environmental sustainability.

    • To the Client: Render judgment only within limits of competence; maintain confidentiality.

    • To the Profession: Commit to Lifelong learning through Continuing Professional Development (CPD).

Malnutrition: Forms, Causes, and Consequences

  • Definitions and Classifications:

    • Undernutrition: Inadequate food consumption over time.

      • Underweight: Low weight-for-age. Moderate is −2 SD-2\,SD to −3 SD-3\,SD; Severe is below −3 SD-3\,SD from the median.

      • Stunting: Low height-for-age (chronic undernutrition).

      • Wasting: Low weight-for-height (acute food deprivation).

      • Marasmus: Severe wasting ("skin and bones").

      • Kwashiorkor: Edematous malnutrition; sparse hair and discolored skin.

    • Overnutrition: Excessive intake leading to overweight and obesity.

    • Micronutrient Deficiencies (MNDs): Pathological lack of specific nutrients (VADD, IDA, IDD).

  • Causes (UNICEF Framework):

    • Immediate: Inadequate dietary intake and disease.

    • Underlying: Food insecurity, inadequate care for women/children, poor sanitation, and health services.

    • Basic: Resources/control, economic structure, and political/ideological superstructure.

  • The Malnutrition-Underdevelopment Cycle: Undernourished children become poor learners → unskilled adults → unemployed/underemployed → low productivity and poverty → repeat cycle.

Nutrition Across the Life Stages: Growth and Pregnancy

  • Principles of Growth:

    • Hyperplasia: Increase in cell number via division (reversible if stimulus removed).

    • Hypertrophy: Increase in cell size (division ceases).

    • Development Directions: Cephalocaudal (head to body to legs) and Proximodistal (central axis to extremities).

  • Hormonal Systems in Women: Hypothalamus secretes LHRH → Anterior Pituitary secretes LH/FSH → Ovaries secrete Estrogen/Progesterone. Estrogens increase uterine size by 2×2 \times or 3×3 \times and initiate fat deposits in breasts and hips.

  • Physiological Changes in Pregnancy:

    • Cardiovascular: Cardiac output increases 30%–50%30\%\text{--}50\%. Blood volume increases up to 50%50\%.

    • Metabolic: Basal Metabolic Rate (BMR) increases 20%–25%20\%\text{--}25\%. Glucose is the primary fetal fuel; fat is the primary maternal fuel.

    • Weight Gain (Brown, 2011):

      • Underweight: 28–40 lb28\text{--}40\,lb.

      • Normal weight: 25–35 lb25\text{--}35\,lb.

      • Overweight: 15–25 lb15\text{--}25\,lb.

      • Obese: 11–20 lb11\text{--}20\,lb.

  • Nutrient Requirements (PDRI 2015):

    • Energy: +300 kcal+300\,kcal for 2nd and 3rd trimesters.

    • Protein: +25 g+25\,g.

    • Folate: +200 μg+200\,\mu g (total 600 μg600\,\mu g) to avoid neural tube defects.

    • Iron: Supplementation is routinely recommended to cover a total cost of 500–800 mg500\text{--}800\,mg per pregnancy.

  • Maternal Risks and Complications:

    • Pregnancy-Induced Hypertension (PIH): Symptoms include hypertension, albuminuria, and edema.

    • Harmful Substances: Smoking causes fetal oxygen deprivation; Alcohol causes Fetal Alcohol Syndrome (FAS).

Nutrition in Lactation and Infancy

  • Physiology of Lactation:

    • Prolactin: Stimulates milk production; triggered by sucking at the nipple.

    • Oxytocin: Triggers the let-down reflex (milk ejection).

    • Colostrum: Yellowish milk secreted in the first 2–32\text{--}3 days; high in protein and carotene (67 kcal/100 mL67\,kcal/100\,mL).

    • Mature Milk: contains Casein, Whey (lactalbumin/lactoferrin), and essential amino acids like Taurine.

  • Advantages of Breastfeeding:

    • For Baby: Provides IgA (immunity), decreases obesity risk, prevents "formulogenic disease."

    • For Mother: Promotes uterine involution, increases postpartum anovulation, and saves money.

  • Infant Growth:

    • Weight: Doubles by 5 months5\,months and triples by 1 year1\,year.

    • Height: Increases by 50%50\% in the first year (25–30 cm25\text{--}30\,cm).

  • Nutrient priorities:

    • Water: Infants require more per unit body size due to immature kidneys.

    • Vitamin K: Given as a prophylactic dose at birth to prevent hemorrhage.

    • Complementary Feeding: Starts at 6 months6\,months; must be timely, adequate, safe, and appropriate.

Nutritional Assessment Systems

  • Nutrition Survey: Collection of cross-sectional data to define overall status.

  • Nutrition Surveillance: Continuous monitoring of specific groups to evaluate gov policies.

  • Nutrition Screening: Rapid, simple, large-scale application of pre-determined cut-offs to identify at-risk individuals.

  • Key Statistical Indicators:

    • Validity: Adequacy with which a measurement reflects what it is intended to measure.

    • Precision/Reproducibility: Degree to which repeated measurements give same value.

    • Sensitivity (Se): Ability to reflect nutritional status changes.

    • Specificity (Sp): Ability to identify those who are genuinely well-nourished.

  • Dietary Assessment Methods:

    • National Level: Food Balance Sheets (FBS) and Total Diet Studies (TDS).

    • Household Level: Food Account, Food Record, 24-hour Food list recall, Inventory method.

    • Individual Level: 24-hour recall (relies on memory), Estimated/Weighed Food Records, Food Frequency Questionnaire (FFQ).

  • Anthropometric Indices:

    • Weight-for-Age: Acute malnutrition indicator.

    • Height-for-Age: Chronic status indicator (stunting).

    • BMI: weight (kg)/height2 (m2)weight\,(kg) / height^2\,(m^2). Adults: Normal =18.5–24.99= 18.5\text{--}24.99; Obese ≥30.0\ge 30.0.

  • Biochemical Assessment:

    • Anemia: Hemoglobin < 11.0\,g/dL in children (6 mos–6 y6\,mos–6\,y) and pregnant women.

    • Vitamin A Deficiency: Serum retinol < 0.70\,\mu mol/L (subclinical) or < 0.35\,\mu mol/L (severe).

    • Iodine Deficiency: Median urinary iodine concentration 100–199 μg/L100\text{--}199\,\mu g/L is adequate.

  • Clinical Assessment: Methodology for advanced stages (physical signs in skin, hair, eyes).

Food and Nutrition Research and Ethics

  • The Scientific Method: Question → Research → Hypothesis → Experiment → Analysis → Conclusion.

  • Types of Research:

    • Fundamental/Pure: Theory development.

    • Applied: Improving a product/process.

    • Historical: Investigations of "what was."

    • Action research: Immediate local application.

  • Epistemology vs Ontology:

    • Positivism: Explaining phenomena (Objectivism).

    • Interpretivism: Understanding phenomena (Constructionism).

  • Study Designs:

    • Descriptive Epidemiology: Person, Place, Time (PPT).

    • Ecological Study: Compares groups (vulnerable to Ecologic Fallacy).

    • Cross-sectional: "Snapshot" of prevalence.

    • Case-control: Retrospective (Uses Odds Ratio).

    • Cohort Study: Prospective (Uses Risk Ratio).

    • Experimental (RCT): Gold standard; involves randomization and blinding.

  • Research Ethics (The 3Rs):

    1. Refinement: Improving welfare in lab settings.

    2. Reduction: Using fewer animals.

    3. Replacement: Using non-animal alternatives.

  • Measurement Validity:

    • Internal Validity: Control of bias/systematic errors.

    • External Validity: Generalizability to the population.

Food and Nutrition Security and Interventions

  • Food and Nutrition System: Components include food production (inputs/cultivation), distribution (trade/infrastructure), consumption (income/culture), and biologic utilization (health/digestion).

  • Four Pillars of Food Security:

    1. Availability: Physical existence of food.

    2. Access: Resources to obtain food.

    3. Use/Utilization: Physiological management of food.

    4. Stability: Temporal dimension (Chronic vs Transitory insecurity).

  • Philippine Plan of Action for Nutrition (PPAN) 2017–2022:

    • Nutrition-Specific Programs: IYCF, integrated management of acute malnutrition, mandatory food fortification, micronutrient supplementation.

    • Nutrition-Sensitive Programs: Farm-to-market roads, Coconut Rehabilitation, Gulayan sa Paaralan, water/sanitation (SALINTUBIG).

    • Enabling Programs: Policy development and local government mobilization.

  • Laws Supporting Interventions:

    • RA 8172 (ASIN Law): Mandatory salt iodization.

    • RA 8976 (Food Fortification Law): Mandatory fortification of rice (iron), flour/oil/sugar (Vitamin A).

    • EO 51 (Milk Code): Regulates marketing of breastmilk substitutes.

    • RA 10028: Expanded Breastfeeding Promotion Act (Lactation stations).

  • Severe Acute Malnutrition (SAM) Management:

    • Outpatient Care: Children with SAM but good appetite and no medical complications are treated with Ready-to-Use Therapeutic Food (RUTF).

    • Inpatient Care: Children with SAM and medical complications (lethargy, fever, etc.).

    • MUAC Monitoring: A tool for identifying those at highest risk of death.

Nutrition Education and Program Management

  • Behavior Change Theories:

    • Knowledge-Attitude-Behavior (KAB): Assumes knowledge accumulation leads to change.

    • Health Belief Model (HBM): Focuses on perceived susceptibility, severity, benefits, and barriers.

    • Theory of Planned Behavior (TPB): Influence of attitudes, social norms, and perceived control.

    • Social Cognitive Theory (SCT): Outcome expectations and self-efficacy (confidence).

    • Transtheoretical Model: Stages (Pre-contemplation, Contemplation, Preparation, Action, Maintenance).

  • NPM Cycle (Nutrition Program Management):

    • Phase 1: Plan Preparation: Situation assessment, objective setting (SMART), prioritizing interventions (relevance/feasibility).

    • Phase 2: Implementation: Budget management, training, supervision of workers (BNS/BHW), and documentation.

    • Phase 3: Monitoring & Evaluation: Tracking input/output indicators; process vs impact evaluation.

    • Phase 4: Sustainability: Ensuring institutional/financial ownership by the LGU.

  • Monitoring and Evaluation of Local Level Plan Implementation (MELLPI):

    • Green Banner: Top performer in a region.

    • CROWN Award: consistent regional winner for 3 years.

    • Nutrition Honor Award: highest distinction.