The first collection, the one with the oldest data, contains the observations for Maputo (then Lourenco Marques, Campos Rodrigues Observatory) for 1909-60 (bihourly from 1910).
Vital signs were assessed continuously via bedside monitoring and charted bihourly unless patients exhibited signs of clinical deterioration, in which case, more frequent assessments were obtained.
For the symptom-triggered approach, the patient's CIWA-Ar score is determined hourly or bihourly and the medication is administered only when the score is elevated.