Distribution of children who underwent (adeno)tonsillectomy by deprivation level in 2011/12 (N = 27610)^*.

<p>Data source: Hospital Episodes Statistics data.</p><p>*Deprivation data >99% complete.</p

(Adeno)tonsillectomy by age group and sex in 2011/12 (N = 27732).

<p>Data source: Hospital Episodes Statistics data.</p><p>*χ² test for linear trend.</p

Obstructive sleep apnoea syndrome and deprivation among children who underwent (adeno)tonsillectomy (aged <4 years).

<p>Data source: Hospital Episodes Statistics data.</p><p>*χ² test.</p><p>OSAS – obstructive sleep apnoea syndrome.</p><p>Deprivation data >99% complete.</p

Distribution of children who underwent (adeno)tonsillectomy by deprivation level in 2001/2 (N = 29653)^*.

<p>Data source: Hospital Episodes Statistics data.</p><p>*Deprivation data >99% complete.</p

(Adeno)tonsillectomy rates by age group, 2001/2 and 2011/12.

<p>Rates per 100,000 children.</p><p>Data source: Hospital Episodes Statistics data.</p

(Adeno)tonsillectomy by age group and sex in 2001/2 (N = 29697).

<p>Data source: Hospital Episodes Statistics data.</p><p>*χ² test for linear trend.</p

Trends in (adeno)tonsillectomy rates by age-group (<4 years and 4–15 years), 2001/2 to 2011/12.

<p>Trends in (adeno)tonsillectomy rates by age-group (<4 years and 4–15 years), 2001/2 to 2011/12.</p

Calibration plot for logistic regression classification model of pCA exposure.

<p>Calibration plot for logistic regression classification model of pCA exposure.</p

Distribution of included patients for 6 predefined groups by region.

<p>Distribution of included patients for 6 predefined groups by region.</p

Overall proportions of treated patients within predefined group and the expected rate of exposure to pediatric reserve antibiotics (pCAs).

<p>Overall proportions of treated patients within predefined group and the expected rate of exposure to pediatric reserve antibiotics (pCAs).</p