Situation: The father, 40, a construction worker, has bacteriologically confirmed pulmonary tuberculosis (TB) and started treatment 2 months ago at the Rural Health Unit (RHU), 12 km from home. The family of five lives in a one-room house with small windows that are kept closed. The children are 3, 7, and 12 years old. A barangay health station (BHS) with a midwife is within walking distance of the home. One objective states: "Within 1 month, the father will not miss any dose of his TB drugs." Which data should the nurse use to evaluate this objective?

The objective is about taking every dose, so the direct evidence is the treatment card on which each dose taken is recorded. Feeling better, weight gain, and sputum results reflect response to treatment, which relates to the broader goal, but they do not show that no dose was missed.

The objective focuses on medication adherence, specifically whether the father completes every scheduled dose over a one-month period. To evaluate this, the nurse needs a direct, objective record of dose-by-dose intake, not indirect markers of clinical improvement.

Why the treatment card is the correct data source

The treatment card is a dose-by-dose documentation tool used in TB programs, especially under directly observed treatment (DOT) or facility-based supervision. Each time the father takes his anti-TB drugs, the health worker or midwife records the dose on the card. This creates a continuous, verifiable record that directly answers the question: Did the father miss any dose during the past month?

Adherence measurement in TB care has no single perfect gold standard, but dose documentation remains the most practical and widely used method in low-resource settings ^[1]. The treatment card functions as a proxy for directly observed ingestion, meaning it captures whether the dose was actually taken under supervision, not just whether the patient claims to have taken it.

Data source	What it measures	Can it detect a missed dose?
Treatment card	Each dose taken, recorded at the time of administration	Yes — direct evidence of adherence
Weight change	Nutritional and clinical response over time	No — weight may improve even with occasional missed doses
Patient’s self-report of feeling better	Subjective symptom improvement	No — feeling better does not confirm every dose was taken
Follow-up sputum examination	Bacteriological response to treatment	No — sputum conversion reflects overall treatment efficacy, not daily adherence

Key point! Weight gain, symptom improvement, and sputum conversion are outcome indicators that reflect whether treatment is working. They belong to the broader goal of “cure” or “treatment success.” The objective in this scenario is narrower: no missed dose within one month. Only the treatment card directly measures that process indicator.

Watch out! A patient can feel better and gain weight while still occasionally skipping doses, especially early in treatment when symptom relief occurs rapidly. Conversely, a patient who takes every dose may not yet show sputum conversion at the two-month mark. Therefore, these clinical markers cannot substitute for dose-by-dose documentation.

In the Philippine Rural Health Unit (RHU) and Barangay Health Station (BHS) context, the treatment card is the standard tool for the National Tuberculosis Control Program (NTP). The midwife at the BHS, within walking distance of the home, can directly observe and record each dose. This aligns with the WHO recommendation that directly observed treatment be complemented by reliable documentation, and digital or paper-based monitoring improves adherence tracking . Video observed therapy (VOT) is an emerging alternative, but it still relies on verifiable documentation of each ingestion event, not on clinical outcomes .

Thus, when the nurse evaluates the objective “the father will not miss any dose,” the most valid and reliable data source is the treatment card showing each dose taken, with any gaps immediately visible.