Understanding and using self-generated validity to promote behaviour change: increasing uptake of the seasonal flu jab for the over 65s

Understanding and using self-generated validity to promote behaviour change: a randomised trial on increasing uptake of the seasonal flu jab for the over 65s

Status

Active, not recruiting

Phases

Phase 1

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN84500365

Enrollment

15000

Registered

2011-08-17

Start date

2011-09-12

Completion date

Unknown

Last updated

2017-04-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Topic: Primary Care Research Network for England

Interventions

The interventions relate to patients being assigned to one of eight conditions and receiving one set of the following: Group 1: ?standard invite materials only (control 1) Group 2: short questionnaire

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: All patients over 65 registered with participating general practitioners (GPs) who are being sent their annual flu jab invite Target Gender: Male & Female; Lower Age Limit 65 no age limit or unit specified

Exclusion criteria

Exclusion criteria: Does not meet inclusion criteria

Design outcomes

Primary

Measure	Time frame
Uptake of flu jab for over 65s; timepoint(s): between September 2010 and March 2011	—

Secondary

Measure	Time frame
Duration from invite to uptake in days. Differences in attendance rates by condition, social class and their interaction will also be analysed, as well as the impacts on time delay to uptake. Given that SGV effects may only operate in those completing questionnaires, secondary analysis will examine differences in condition among those who returned completed questionnaires. Analysis will also examine the impact of questionnaire responses on attendance rates within conditions (e.g., is attendance higher among those with stronger intentions to attend).	—

Measure

Time frame

Duration from invite to uptake in days. Differences in attendance rates by condition, social class and their interaction will also be analysed, as well as the impacts on time delay to uptake. Given that SGV effects may only operate in those completing questionnaires, secondary analysis will examine differences in condition among those who returned completed questionnaires. Analysis will also examine the impact of questionnaire responses on attendance rates within conditions (e.g., is attendance higher among those with stronger intentions to attend).

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Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026