List of ‘maltreatment-related’ codes used to ascertain cases in THIN (Read codes shown are codes used ≥50 times in our dataset in 2009–10, ordered by code chapter).

*<p>Read Version 2 (5-Byte).For more detail on frequency of codes in THIN, sees ‘supplementary material’ at <a href="http://www.clininf.eu/maltreatment" target="_blank">www.clininf.eu/maltreatment</a>.</p>**<p>13IF code with a more specific meaning due to the addition of the “.11” term code.</p

Prevalence of any maltreatment-related code from 2008 to 2010: unadjusted variation by practice.

<p>Prevalence of any maltreatment-related code from 2008 to 2010: unadjusted variation by practice.</p

Senstivity analyses.

<p>Senstivity analyses.</p

Variation between practice.

<p><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0049808#pone-0049808-g003" target="_blank">Figure 3</a> is based on prevalence of first maltreatment-related record over three years (2008–2010). It shows the number of standard errors between practice prevalence estimates and the grand mean (mean of all 443 practices), adjusted for age, sex and deprivation.</p

Annual percentage change 1995–2010 in rate of maltreatment-related codes, by code sub-category and age.

*<p>Adjusted for sex, deprivation quintile, age and overdispersion at the practice level.</p>†<p>Adjusted for sex, deprivation quintile and overdispersion at the practice level.</p

Characteristics of children included in the cohort.

<p>Characteristics of children included in the cohort.</p

Rate and rate ratio of any maltreatment-related code per 1000 child years at risk (95%CI) in 2010, by child characteristic.

♠<p>Age at first maltreatment-related code in 2010.</p>†<p>Deprivation quintiles based on Townsend score.</p>*<p>Unadjusted.</p>**<p>Adjusted for other characteristics in table and overdispersion.</p