Table 5. Post Hoc Results for Statistically Significant Medical and Psychiatric Characteristics in Table 2

Characteristics	Post Hoc P Values
Characteristics	Substantial/Severe vs Low	Substantial/Severe vs Intermediate	Intermediate vs Low
Medical
ED
≥1 ED visit^*	<.001	ns	.004
Mean visits^{^†}	<.001	<.001	.002
Mean costs^{^†}	<.001	.001	ns
Outpatient medical
≥1 Outpatient visit^*	ns	ns	ns
Mean visits^{^‡}	.004	ns	ns
Inpatient preceded by an ED visit
≥1 Inpatient admissions^*	.003	.001	ns
Mean admissions^{^†}	.003	.01	ns
Mean costs^{^†}	ns	.03	ns
Psychiatric
High psychiatric severity, ASI psychiatric status composite score >0.38^*	<.001	<.001	.007
ASI psychiatric status composite score^{^†}	<.001	<.001	<.001
Prescribed medication for psychological or emotional problems, over lifetime^*	<.001	<.001	ns

↵* Data are Bonferroni-adjusted P values.
↵† Data are Games-Howell–adjusted P values.
↵‡ Data are Tukey-adjusted P values.
ASI, Addiction Severity Index Lite; ED, emergency department; ns, not significant.