6 Key elements of the surveillance process

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Table 1 summarises the key elements at each review point.

**Table 1 Key elements of the surveillance process**
Time since publication	Key elements of the surveillance process
2 years	Surveillance limited to scope of existing guideline Surveillance review based on related Evidence Update product No public consultation
4 years	Surveillance will also consider key areas outside the scope of the existing guideline NICE Information Services literature search, and summary of new evidence Intelligence gathering (including Information Services topic search of standard sources and guideline development group [GDG] questionnaire) Public consultation only on 'no update' decisions
6 years	Surveillance limited to scope of existing guideline Limited surveillance evidence review and summary of new evidence (with limits imposed, such as including evidence from systematic reviews only) Intelligence gathering (including Information Services topic search of standard sources and GDG questionnaire) No public consultation
8 years	Surveillance will also consider key areas outside the scope of the existing guideline Information Services literature search, and summary of new evidence Intelligence gathering (including Information Services topic search of standard sources and GDG questionnaire) Public consultation only on 'no update' decisions.
10 years	Surveillance limited to scope of existing guideline Limited surveillance evidence review and summary of new evidence (with limits imposed, such as including evidence from systematic reviews only) Intelligence gathering (including Information Services topic search of standard sources and GDG questionnaire) No public consultation