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. Author manuscript; available in PMC: 2018 May 1.
Published in final edited form as: Cancer. 2017 Jan 9;123(9):1585–1589. doi: 10.1002/cncr.30476

Table 1.

Mammography Screening Results

Pre-ACA Post-ACA p-value comparing periods2 p-value for interaction3
OR 95% CI p1 OR 95% CI p1
Income Q1vQ4 0.87 (0.86, 0.88) <0.0001 0.94 (0.93, 0.95) <0.0001 <0.0001 <0.0001
Q2vQ4 0.96 (0.95, 0.97) <0.0001 1.00 (0.99, 1.01) 0.53 <0.0001
Q3vQ4 1.01 (1.00,1.02) 0.0091 1.01 (1.00, 1.02) 0.0048 0.97
Education Q1vQ4 0.76 (0.75, 0.77) <0.0001 0.86 (0.85, 0.87) <0.0001 <0.0001 <0.0001
Q2vQ4 0.83 (0.82, 0.84) <0.0001 0.91 (0.91, 0.92) <0.0001 <0.0001
Q3vQ4 0.89 (0.88, 0.90) <0.0001 0.95 (0.94, 0.96) <0.0001 <0.0001
1

Tests whether the corresponding odds ratio equals 1.0

2

Tests whether the odds ratios from different periods are equal

3

Tests the null hypothesis that none of the odds ratios comparing quartiles differ between the two periods

OR's comparing screening rates for Post-ACA vs. Pre-ACA periods, by income and education quartiles