X About Prevalence

Key quote SAAUK uses is in bold 3/4 down this page

NICE Guidance For Public – doesnt mention prevalence

NICE Clinical Guidelines for Healthcare Professionals) only has this comparison:
Social anxiety disorder (previously known as ‘social phobia’) is one of the most common of the anxiety disorders. Estimates of lifetime prevalence vary but according to a US study, 12% of adults in the US will have social anxiety disorder at some point in their lives, compared with estimates of around 6% for generalised anxiety disorder (GAD), 5% for panic disorder, 7% for post-traumatic stress disorder (PTSD) and 2% for obsessive–compulsive disorder. There is a significant degree of comorbidity between social anxiety disorder and other mental health problems, most notably depression (19%), substance-use disorder (17%), GAD (5%), panic disorder (6%), and PTSD (3%)

NICE FULL Guidance (293 pages) essentialy repeats the above but ALSO see further below in BOLD
it is clear that social anxiety is one of the most common of all the anxiety disorders. Lifetime prevalence rates of up to 12% have been reported (Kessler et al., 2005a) compared with lifetime prevalence estimates for other anxiety disorders of 6% for generalised anxiety disorder (GAD), 5% for panic disorder, 7% for post-traumatic stress disorder (PTSD) and 2% for obsessivecompulsive disorder (OCD).

Immediately after the above quote it references stricter and annual / yearly criteria:
Twelve-month prevalence rates as high as 7% have been reported for social anxiety disorder (Kessler et al., 2005b). Using strict criteria and face-to-face interviews in the US, the lifetime and yearly prevalence figures are halved to 5% and 3%, respectively (Grant et al., 2005)

In terms of UK numbers in millions:
Wide Criteria Lifetime (12%) 6.3 million
Wide Criteria annually (7%) 3.7 million
Strict Criteria Lifetime (5%) 2.6 million
Strict Criteria annually (3%) 1.5 million
(Those are all by doing the maths on UK adult population statistics)
Further USA data is available at www.nimh.nih.gov/health/statistics/social-anxiety-disorder.

Mentioned as 3rd most common MH condition within this article :
https://www.bmj.com/content/327/7414/515
AND
https://www.ncbi.nlm.nih.gov/books/NBK327674/).
where it quotes “Kessler et al”.

Prevalence in Children
Place2be quote 78% of children who seek support feel anxious socially place2be-encourages-meaningful-connections-as-78-of-children-who-seek-support-have-social-anxiety/

www.anxietycanada.com quote 7% – see www.anxietycanada.com/disorders/social-anxiety-in-children. “An equal number of girls and boys experience social anxiety, and in any given school year about 7% of children will have a diagnosis of social anxiety.”