Article Figures & Data
Figures
- Figure 1.
Study design for 15 practices into 3 wedges.
- Figure 2.
Incidence rate of patients screened for Hepatitis C virus (HCV) for each time period without any previous record of HCV screening. Each wedge consists of 5 practices and each time period consist of 3 months.
Tables
- Table 1.
Stepped Wedge Study Design and Number of Patients Eligible for Hepatitis C virus (HCV) Screening
Time Period 1 Baseline (0–3 months) Time Period 2(3–6 months) Time Period 3(6–9 months) Time Period 4(9–12 months) Practice 1 to 5 (Wedge 1) 6,206 6,296 6,184 6,020 Practice 6 to 10 (Wedge 2) 11,092 11,738 11,460 10,727 Practice 11 to 15 (Wedge 3) 4,244 3,962 4,087 3,681 Control periods before the HCV education intervention (non-underlined); intervention periods after the rollout of the HCV educational intervention (underlined).
Control Intervention n = 41,3291 n = 44,3681 p-value Wedge <0.001 1 6,206 (15%) 18,500 (42%) 2 22,830 (55%) 22,187 (50%) 3 12,293 (30%) 3,681 (8.3%) Time Period <0.001 1 21,542 (52%) 0 (0%) 2 15,700 (38%) 6,296 (14%) 3 4,087 (9.9%) 17,644 (40%) 4 0 (0%) 20,428 (46%) White 29,526 (71%) 33,048 (74%) <0.001 African American 9,507 (23%) 8,885 (20%) <0.001 Asian 704 (1.7%) 807 (1.8%) 0.2 Multi-Race/Other 1,592 (3.9%) 1,628 (3.7%) 0.2 Age < 65 25,346 (61%) 26,540 (60%) <0.001 Age 65 or older 15,983 (39%) 17,828 (40%) <0.001 Baby Boomer 41,329 (100%) 44,368 (100%) Hispanic/Latino 1,234 (3.0%) 1,378 (3.1%) 0.3 Gender – Female 23,929 (58%) 25,364 (57%) 0.030 In Person 28,763 (70%) 30,588 (69%) 0.038 Site Name <0.001 Practice 1 2,331 (5.6%) 2,115 (4.8%) Practice 2 1,796 (4.3%) 5,049 (11%) Practice 3 3,344 (8.1%) 3,260 (7.3%) Practice 4 3,912 (9.5%) 1,269 (2.9%) Practice 5 763 (1.8%) 2,304 (5.2%) Practice 6 1,411 (3.4%) 4,637 (10%) Practice 7 12,630 (31%) 12,292 (28%) Practice 8 2,106 (5.1%) 563 (1.3%) Practice 9 2,774 (6.7%) 791 (1.8%) Practice 10 1,623 (3.9%) 4,767 (11%) Practice 11 613 (1.5%) 1,743 (3.9%) Practice 12 1,555 (3.8%) 482 (1.1%) Practice 13 1,798 (4.4%) 1,901 (4.3%) Practice 14 1,946 (4.7%) 576 (1.3%) Practice 15 2,727 (6.6%) 2,619 (5.9%) 1n (%).
2Pearson's χ2 test.
Variable Beta (SE) OR Constant −3.327*** (0.395) 0.036 0.017 0.078 Intervention −0.032 (0.090) 0.969 0.812 1.155 In Person 0.210 (0.528) 1.234 0.438 3.475 Gender - Female −0.141*** (0.034) 0.868 0.813 0.927 Less than 65 0.293*** (0.035) 1.340 1.251 1.436 African American −0.052 (0.041) 0.949 0.875 1.029 Asian 0.203* (0.113) 1.225 0.982 1.527 Multi-Race/Other −0.092 (0.093) 0.912 0.760 1.094 Hispanic/Latino 0.039 (0.096) 1.039 0.861 1.254 Time Period 2 −0.202*** (0.053) 0.817 0.736 0.906 Time Period 3 −0.089 (0.068) 0.915 0.802 1.045 Time Period 4 −0.064 (0.079) 0.938 0.803 1.095 Intervention: In Person 0.259*** (0.085) 1.296 1.098 1.529 Observations 85,697 Log Likelihood −14,656.500 Akaike Inf. Crit. 29,340.990 Bayesian Inf. Crit. 29,472.010 Abbreviations: SE, standard error; OR, odds ratio.
↵*P < .1; **P < .05; ***P < .01.
