008], and bacterial diarrhea was associated with the number of holding tanks per 40-acre quarter-quarter section (AOR, 1.
75 hectares), and quarter-quarter section (40 acres, 16.
Bacterial diarrhea was independently associated with the number of holding tanks in the quarter-quarter section (40-acre block) of the residence (Table 4).
Bacterial diarrhea was marginally associated with the number of holding tanks per quarter-quarter section (13 cases, 111 controls; AOR, 1.
For bacterial diarrhea, the threshold was > 1 holding tank per quarter-quarter section ([greater than or equal to] 75th percentile of the density distribution of the controls), resulting in an AOR of 2.
This geographic coding system specifies the location of property by section (640 acres, which is also one square mile), quarter section (160 acres), and quarter-quarter section (40 acres).
Bacterial diarrhea was associated with holding tank density only at the quarter-quarter section level, with the risk increasing by 22% with each additional tank.