Trap · frequency · patient PT009

q8h read as eight doses a day

Every eight hours is three doses, not eight. The misreading raises alarms on orders that are fine.

The patient's rows

Exactly what the agent sees for PT009, copied from the chart. The value this mistake misreads is underlined.

patients.csv

patient_id	age_years	sex	weight	weight_unit
PT009	39	F	59	kg

labs.csv

patient_id	creatinine	creatinine_unit	collected_at
PT009	0.9	mg/dL	2026-10-31T05:48

meds.csv

order_id	patient_id	drug	dose_mg	frequency	start_time	status
RX4864	PT009	Cylvarone	200	q12h (the value this mistake misreads)	2026-10-18T07:55	active
RX3742	PT009	Exalmizide	600	q8h (the value this mistake misreads)	2026-10-24T00:13	active

Two readings of the same rows

Every step is shown. Where the careless reading goes wrong, the value is underlined.

What a careless agent computes

Takes the number in qNh as doses per day, so q8h becomes 8 a day and q12h becomes 12.

Weight: 59 read as kg → 59 kg
Creatinine: 0.9 mg/dL (2026-10-31T05:48) read as mg/dL → 0.90 mg/dL
CrCl: (140 − 39) × 59 ÷ (72 × 0.90) × 0.85 = 78.2 mL/min

Order	Daily dose	Limit	Flagged
RX4864Cylvarone	200 × 12 = 2400 mg (the value this mistake misreads)	900 mgCrCl 45-90	yes (the value this mistake misreads)
RX3742Exalmizide	600 × 8 = 4800 mg (the value this mistake misreads)	2000 mgCrCl ≥ 70	yes (the value this mistake misreads)

Output line: {"crcl_ml_min":78.2,"flagged_order_ids":["RX3742","RX4864"]}

The correct answer

Reads the unit, status, frequency and time columns as the instruction says, and flags only a daily dose strictly over the band's limit.

Weight: 59 read as kg → 59 kg
Creatinine: 0.9 mg/dL (2026-10-31T05:48) read as mg/dL → 0.90 mg/dL
CrCl: (140 − 39) × 59 ÷ (72 × 0.90) × 0.85 = 78.2 mL/min

Order	Daily dose	Limit	Flagged
RX4864Cylvarone	200 × 2 = 400 mg	900 mgCrCl 45-90	no
RX3742Exalmizide	600 × 3 = 1800 mg	2000 mgCrCl ≥ 70	no

Output line: {"crcl_ml_min":78.2,"flagged_order_ids":[]}

The test that catches it

The careless output, graded by the task's real test file. This is what pytest printed.

Flagged set exact · PT009test_flagged_orders_exact[PT009]

AssertionError: PT009: flagged ['RX3742', 'RX4864'] vs expected []

tests/test_outputs.py

@pytest.mark.parametrize("pid", PATIENT_IDS)
def test_flagged_orders_exact(by_patient, pid):
    assert pid in by_patient, f"no output for {pid}"
    got = by_patient[pid].get("flagged_order_ids")
    assert isinstance(got, list)
    assert set(got) == set(EXPECTED[pid]["flagged_order_ids"]), \
        f"{pid}: flagged {sorted(got)} vs expected {EXPECTED[pid]['flagged_order_ids']}"

No other patient's answer moves under this mistake, so this one failure is the whole signal.