English to Spanish Other Mathematics & Statistics

These results provide necessary prevalence estimates for community cluster investigations and establish baseline estimates for future studies to evaluate temporal trends in disease prevalence.

Por lo que estuve investigando, "cluster investigations" se usa como una unidad. Ej.

Cluster investigations: are they worth it?

The unexpected clustering of rare and often fatal diseases in specific localities gives cause for concern. When it happens, members of the public often draw it to the attention of their doctors, who in turn pass on the information to local public health units or other authorities.
The outcomes of systematic investigation of such disease clusters rarely see the light of day in peer-reviewed journals. In that regard the report in this issue of the Journal by Westley-Wise and her colleagues of an investigation into a cluster of leukaemia cases among residents near a major steelworks is unusual.1 What is not unusual, however, is the report's failure to produce a persuasive explanation for the observed cluster, although it usefully reports some ambient benzene levels (levels that are orders of magnitude lower than those known to produce health effects and similarly lower than levels inhaled in cigarette smoke).

Necesito saber el término técnico en español (si existe).
¡Muchas gracias!