Portal Self-Report vs IVR Self-Report: Intervention Patients With Self-reported Influenza Vaccinations Documented in Electronic Health Record (EHR)

Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.

Measures 6

Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.

Measure	Value	95% interval, lower	95% interval, upper	Method	Source
Risk in group 1	0.153	0.146	0.16	wilson	ClinicalTrials.gov
Risk in group 2	0.452	0.444	0.46	wilson	ClinicalTrials.gov
Risk difference, group 1 minus group 2	-0.299	-0.309	-0.288	newcombe hybrid score	ClinicalTrials.gov
Risk ratio, group 1 over group 2	0.338	0.322	0.355	log	ClinicalTrials.gov
Odds ratio, group 1 over group 2	0.219	0.205	0.233	log	ClinicalTrials.gov
Number needed to treat, for one fewer participant with the outcome on Portal Self-Report than on IVR Self-Report	3.35	3.23	3.47	from the risk difference interval	ClinicalTrials.gov

Groups 2

Neither group, or both, names a comparator, so the groups keep ClinicalTrials.gov's order.

Group	Title	Description	With the outcome	Analysed	ClinicalTrials.gov code	Source
Group 1	Portal Self-Report	Patients who received portal questionnaire.	1,527	10,000	OG000	ClinicalTrials.gov
Group 2	IVR Self-Report	Patients who received IVR questionnaire.	6,774	15,000	OG001	ClinicalTrials.gov

Outcome 5

Field	Value	Source
Type	OTHER_PRE_SPECIFIED	ClinicalTrials.gov
Title	Intervention Patients With Self-reported Influenza Vaccinations Documented in Electronic Health Record (EHR)	ClinicalTrials.gov
Description	We calculated the percent of patients who used the portal or IVR to self-report influenza vaccine completion outside of the medical group, measured on April 1, 2015. We used as our denominator all those patients who received portal messages (10,000) and all those who received IVR calls (15,000).	ClinicalTrials.gov
Time frame	Months 11-16	ClinicalTrials.gov
Population		ClinicalTrials.gov

Trial 8

Field	Value	Source
Title	System Alignment for VaccinE Delivery (SAVED): Improving Rates of Influenza and Pneumococcal Vaccination Through Patient Outreach, Improved Medical Record Accuracy and Targeted Physician Alerts	ClinicalTrials.gov
NCT number	NCT02266277	ClinicalTrials.gov
Phases	NA	ClinicalTrials.gov
Conditions	Influenza, Infections, Pneumococcal	ClinicalTrials.gov
Interventions	Arm 1: E-portal message with IVR call, Arm 2: E-portal message with no IVR call, Arm 3: No e-portal message with IVR call, Arm 5: IVR call	ClinicalTrials.gov
Lead sponsor	University of Massachusetts, Worcester	ClinicalTrials.gov
Results first posted	2017-03-28	ClinicalTrials.gov
Results on ClinicalTrials.gov	https://clinicaltrials.gov/study/NCT02266277?tab=results	ClinicalTrials.gov

Source 4

Field	Value	Source
Release	trial-comparisons-2026-03-23-0.1.0	ClinicalTrials.gov
Release manifest SHA-256	f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57	ClinicalTrials.gov
AACT copy	2026-03-23	ClinicalTrials.gov
Tables read	outcome_counts.parquet, outcome_measurements.parquet, outcomes.parquet, reported_event_totals.parquet, reported_events.parquet, result_groups.parquet, studies.parquet, ctgov_trial.parquet	ClinicalTrials.gov

The same record as JSON

Release trial-comparisons-2026-03-23-0.1.0

ClinicalTrials.gov's posted results, through CTTI's AACT: ClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299 ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions. The measures are ConductScience's calculation from them.

ClinicalTrials.gov: none stated ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions. The measures are ConductScience's calculation from them.