Relative poverty is the "most useful measure for ascertaining poverty rates in wealthy developed nations".      Relative poverty measure is used by the United Nations Development Program (UNDP), the United Nations Children's Fund (UNICEF), the Organisation for Economic Co-operation and Development (OECD) and Canadian poverty researchers.      In the European Union, the "relative poverty measure is the most prominent and most–quoted of the EU social inclusion indicators". 
The acute form is more common in children, and usually occurs after recovery from an infection. Frequently the patient has a non-specific viral infection. Although, there are times where acute ITP develops when recovering from a bacterial infection. While adults may also develop acute ITP, the disease occurs more often in gradual form ( chronic ITP). Most adults do not remember whether it had been a viral or bacterial infection. Approximately 90% of ITP patients is younger than 40 years old. Interestingly, the chronic form of ITP affects women more frequently. Read ITP Treatment Methods .