Table 2 Insurance rate ratios by intervention periods and clinic group designation

Time in month

0.999 (0.990–1.009)

0.996 (0.993–0.998)

1.013 (1.004–1.023)

 Pre-period

Ref

Ref

Ref

 Post-period

0.870 (0.736–1.028)

0.908 (0.992–1.037)

1.012 (0.943–1.085)

 Comparison

Ref

Ref

Ref

 Intervention

0.781 (0.450–1.354)

0.908 (0.791–1.042)

1.530 (0.948–2.470)

 Time*Clinic group designation

1.005 (0.990–1.021)

1.001 (0.998–1.004)

0.993 (0.983–1.003)

 Intervention period*Clinic group designation

0.790 (0.621–1.005)^a

1.045 (1.013–1.079)

0.999 (0.904–1.104)

 Percent Female

0.992 (0.988–0.996)

1.002 (1.001–1.003)

0.999 (0.996–1.001)

  < 138% FPL

0.998 (0.995–1.002)

1.001 (1.000–1.002)

0.998 (0.995–1.001)

 Percent English

0.981 (0.972–0.990)

1.004 (1.002–1.006)

0.998 (0.991–1.005)

 Percent Non-Hispanic White

0.995 (0.989–1.001)

0.999 (0.998–1.001)

1.004 (1.001–1.008)

 Oregon

Ref

Ref

Ref

 California

0.151 (0.098–0.233)

1.110 (0.957–1.290)

1.546 (1.038–2.301)

 Ohio

0.872 (0.510–1.488)

0.919 (0.806–1.048)

1.410 (1.010–1.969)