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Table 2 Interrupted Time Series Regression Results on the Probability of Out-of-network Mental Health Service Use, Quantity of Out-of-network Services, and Total Out-of-network Spending 2007–2012

From: Was federal parity associated with changes in Out-of-network mental health care use and spending?

  Coefficient Standard Error P-Value
Share with any out-of-network mental health service use among mental health service users
 Parity −0.0305 0.001517 <0.001
 Time −0.0007 0.0000527 <0.001
 Parity*Time 0.0006 0.0000744 <0.001
Average number of out-of-network mental health outpatient visits among out-of-network mental health service users
 Parity 0.1164 0.0211 <0.001
 Time 0.0017 0.0071 0.019
 Parity*Time 0.0053 0.0010 <0.001
Average total out-of-network mental health spending among out-of-network mental health service users
 Parity 49.1050 13.7305 0.001
 Time 2.8294 0.4263 <0.0001
 Parity*Time −1.3412 0.6371 0.040
  1. Notes
  2. The unit of observation is the month/year (N = 72). All regressions include 11 dummy variables to control for month/seasonality
  3. P-values reflect 2-sided tests