Table 3.

Frequency of clustering and aberration detection algorithms (n=66).

Algorithm	Usage, n (%)
Cumulative summation	10 (15)
Space-time permutation scan statistic	10 (15)
Space-time scan statistic	5 (8)
Space scan statistic	4 (6)
Kernel density	3 (5)
Moving average	3 (5)
Log-linear regression	2 (3)
Density-based spatial clustering of applications with noise	2 (3)
Recursive least square	2 (3)
Statistical process control	2 (3)
Autoregressive integrated moving average	2 (3)
Risk-adjusted support vector clustering	1 (2)
Bayesian spatial scan statistic	1 (2)
Exponentially weighted moving average	1 (2)
Flexible space-time scan statistic	1 (2)
k-means clustering	1 (2)
K-nearest neighbor with Haversine distance	1 (2)
Shewhart chart	1 (2)
Pulsar method	1 (2)
Risk-adjusted nearest neighbor hierarchical clustering	1 (2)
Small area regression and testing	1 (2)
Spatiotemporal density-based spatial clustering of applications with noise	1 (2)
What is strange about recent event	1 (2)
Bayesian space-time regression	1 (2)
Generalized linear mixed model	1 (2)
Generalized linear model	1 (2)
Holt-Winters exponential smoother	1 (2)
Temporal scan statistic	1 (2)
Modified Early Aberration Reporting System C2	1 (2)
Temporal aberration detection	1 (2)