Although this rising trend shifted into decline beginning in 2001, improvement was not observed amongst young people, who continued to report such conditions in increasing numbers. The 2012 Swedish National Public Health report has noted that the number of approved new claims has stalled and even fallen amongst people 30 to 64 years old, but has continued to rise amongst those up to 29 years old. The study suggests that a reason for the negative trends that have been observed over the past several decades may correspond to an environmental shift in which “the balance between healthy and unhealthy factors impacting the actively employed has tilted tow'ards less favourable conditions” (Danielsson et al.,