{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T14:24:46Z","timestamp":1791296686676,"version":"4.1.0"},"reference-count":43,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2015,12,13]],"date-time":"2015-12-13T00:00:00Z","timestamp":1449964800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100000835","name":"University of Bath","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000835","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["British J Health Psychol"],"published-print":{"date-parts":[[2016,5]]},"abstract":"<jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>Anxiety is a normal part of childhood and adolescence; however, longitudinal research investigating the development of worrisome thoughts throughout childhood is lacking. This study investigated mothers\u2019 perspectives on their child's normal development of worry as the cognitive component of anxiety and its impact on child functioning in a longitudinal population\u2010based cohort.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      The data for this study were extracted from the Avon Longitudinal Study of Parents and Children. Mothers (\n                      <jats:italic>N\u00a0<\/jats:italic>\n                      =\n                      <jats:italic>\u00a0<\/jats:italic>\n                      2,227) reported on their child's worry content, frequency, control, emotional disruption, and interference when their child was 7, 10, and 13\u00a0years old using the parent component of the Development and Well\u2010being Assessment. At age 10 and 13, pubertal status was assessed using children's self\u2010report of pubic hair developmental progress.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Mothers reported a peak of worrisome thoughts at 10. Emotional disruption was highest at 10, and the highest level of interference in daily life was observed at 13, especially for girls. Advanced pubertal status and worry frequency were positively associated for boys at 10 and girls at 13. Advanced puberty at 10 was also associated with overall higher worry frequency and emotional disruption.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Findings are discussed within a developmental framework outlining the normal development of worrisome thoughts, associated distress, and interference throughout early adolescence. Increased knowledge of normative worry could be informative to further our understanding of adolescence as a vulnerable period for the development of mental health problems, such as generalized anxiety disorder.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:label\/>\n                    <jats:p>\n                      <jats:boxed-text content-type=\"box\" position=\"anchor\">\n                        <jats:caption>\n                          <jats:title>Statement of contribution<\/jats:title>\n                        <\/jats:caption>\n                        <jats:p>\n                          <jats:italic>\n                            <jats:bold>What is already known on this subject?<\/jats:bold>\n                          <\/jats:italic>\n                        <\/jats:p>\n                        <jats:p>\n                          <jats:list list-type=\"bullet\">\n                            <jats:list-item>\n                              <jats:p>Worrying is a normal part of childhood, making distinguishing between normal and pathological worrying challenging.<\/jats:p>\n                            <\/jats:list-item>\n                            <jats:list-item>\n                              <jats:p>Worry content remains consistent between age 4 and 7, but only for boys.<\/jats:p>\n                            <\/jats:list-item>\n                            <jats:list-item>\n                              <jats:p>The complexity and elaboration of worrisome thoughts increase from 8\u00a0years onwards.<\/jats:p>\n                            <\/jats:list-item>\n                          <\/jats:list>\n                        <\/jats:p>\n                        <jats:p>\n                          <jats:italic>\n                            <jats:bold>What does this study add?<\/jats:bold>\n                          <\/jats:italic>\n                        <\/jats:p>\n                        <jats:p>\n                          <jats:list list-type=\"bullet\">\n                            <jats:list-item>\n                              <jats:p>Worry frequency peaks at 10 and a low ability to control those worries can be observed at this age.<\/jats:p>\n                            <\/jats:list-item>\n                            <jats:list-item>\n                              <jats:p>The highest level of interference in performing daily activities due to worries is observed at age 13.<\/jats:p>\n                            <\/jats:list-item>\n                            <jats:list-item>\n                              <jats:p>Child sex and pubertal status play a role in understanding how normal worry patterns develop from age 10 onwards.<\/jats:p>\n                            <\/jats:list-item>\n                          <\/jats:list>\n                        <\/jats:p>\n                      <\/jats:boxed-text>\n                    <\/jats:p>\n                  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