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. 2023 Oct 16;193(2):256–266. doi: 10.1093/aje/kwad205

Table 1.

Estimated Parameters for a 5-Class Overall Growth Mixture Model of Suicide Mortality (Deaths/100,000a) in 3,140 Counties, United States, 2008–2020b

Parameter  c Rate Class
Lowest Middle Lowest Middle Middle Highest Highest
Intercept (Inline graphic) 12.08 12.91 14.26 16.87 23.63
Slope (Inline graphic) 0.41 0.38 0.44 0.56 0.69
Intercept variance (Inline graphic) 4.17 2.01 1.28 1.08 1.03
Slope variance (Inline graphic) 0.10 0.09 0.23 0.31 0.94
Intercept-slope covariance (Inline graphic) 0.42 0.17 0.13 0.04 0.03
Error variance Inline graphic 7.34 35.69 104.25 364.54 2,121.11
Percentage of counties 19.8 28.7 31.8 15.8 4.0
APPA 0.94 0.85 0.85 0.90 0.94

Abbreviation: APPA, average posterior probability of assignment.

a Average number of suicides per 100,000 population.

b Clusters are ordered by the 2008 average rate of suicide death in counties assigned to the cluster (lowest rate to highest rate).

c Estimates from the base model were not adjusted for additional covariates.