Effects of the Vermont Mental Health and Substance Abuse Parity Law

Table C.8: Determinants of the Level of Substance Abuse Service Use: Blue Cross Blue Shield of Vermont, 1996-1999

  Log of Number of Outpatient Substance Abuse Visits per User Log of Number of Inpatient/Partial Substance Abuse Days per Usera
Intercept 1.346***
(0.081) 		2.073***
(0.264)
Age (40 and over omitted)    
   18 and under -0.190***
(0.069) 		-0.115
(0.211)
   19 to 29 -0.131**
(0.062) 		-0.196
(0.202)
   30 to 39 -0.032
(0.047) 		-0.195
(0.171)
Gender (Female omitted) -0.106**
(0.047) 		0.007
(0.147)
Subscriber Status (Dependent omitted) 0.064
(0.051) 		-0.088
(0.168)
County (Chittenden omitted)    
   Addison 0.174*
(0.096) 		0.063
(0.352)
   Bennington -0.009
(0.08) 		0.184
(0.346)
   Caledonia/Essex/Orleans -0.008
(0.067) 		0.167
(0.264)
   Franklin/Grand Isle -0.175*
(0.096) 		0.296
(0.371)
   Lamoille 0.280**
(0.116) 		-0.011
(0.367)
   Orange -0.007
(0.104) 		0.894**
(0.424)
   Rutland 0.060
(0.079) 		0.221
(0.231)
   Washington -0.237***
(0.067) 		-0.243
(0.191)
   Windham/Windsor 0.059
(0.064) 		0.303
(0.212)
Dual Diagnosis (MH/SA) -0.027
(0.048) 		-0.196
(0.137)
Line of Business (VFP omitted)    
   Basic -0.003
(0.054) 		0.113
(0.189)
   Comp 0.075
(0.048) 		0.128
(0.154)
Quarter 0.009
(0.007) 		-0.037*
(0.021)
Managed Care for MH/SA (1 = yes) -0.193***
(0.068) 		0.057
(0.225)
Parity (1 = yes) -0.135*
(0.075) 		0.617***
(0.237)
R-Square 0.047 0.135
F 4.93*** 1.65**
N 2,009 232
Dependent Variable Mean 1.229 1.913
Sources: Original analysis of Blue Cross Blue Shield of Vermont claims/encounter data by Mathematica Policy Research, Inc.
   
a The dependent variable reflects an inpatient-day equivalence, where two "partial" days of treatment are counted as one day of inpatient treatment
   
* Significantly different from zero at the .10 level, two-tailed test.
** Significantly different from zero at the .05 level, two-tailed test.
*** Significantly different from zero at the .01 level, two-tailed test.
   
MH/SA = mental health/substance abuse; VFP = Vermont Freedom Plan.

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