Table 4.

Comparison of all GPS and TreeScan signals across the four drugs studied by threshold.

	Tree-Based Scan Statistic (TreeScan) Signal Thresholds
GPS Signal Thresholds	p ≤ 0.001	0.001< p ≤ 0.05	Total (%)
High	23	0	23 (32)
Medium	21	4	25 (35)
No signal	5	18	23 (32)
TOTAL	49	22	71
GPS Thresholds
Medium: lower 95% CI bound ≥1.5
High: lower 90% CI bound >2.0
Thresholds are mutually exclusive

Note: Data are no. (% of all signals). GPS: Gamma Poisson Shrinker.