Manual workers
Alcoholics

Other conditions
People with a higher-than-average fasting blood glucose level
People with previous hand injury
People with Ledderhose disease (plantar fibromatosis)
People with epilepsy (possibly due to anti-convulsive medication)
People with diabetes mellitus
People with HIV
Previous myocardial infarctionIn one study, those with stage 2 of the disease were found to have a slightly increased risk of mortality, especially from cancer. Diagnosis
Types
According to the American Dupuytrens specialist Dr. Charles Eaton, there may be three types of Dupuytrens disease:
Type 1: A very aggressive form of the disease found in only 3% of people with Dupuytrens, which can affect men under 50 with a family history of Dupuytrens. It is often associated with other symptoms such as knuckle pads and Ledderhose disease. This type is sometimes known as Dupuytrens diathesis. Type 2: The more normal type of Dupuytrens disease, usually found in the palm only, and which generally begins above the age of 50. According to Eaton, this type may be made more severe by other factors such as diabetes or heavy manual labor. Type 3: A mild form of Dupuytrens which is common among diabetics or which may also be caused by certain medications, such as the anti-convulsants taken by people with epilepsy. This type does not lead to full contracture of the fingers, and is probably not inherited. Treatment
Treatment is indicated when the so-called table-top test is positive. With this test, the person places their hand on a table. If the hand lies completely flat on the table, the test is considered negative.
The panel accepted the existence of "a disease of unclear pathogenesis", rejected the claim that MCS was caused by chemical exposure, and proposed these three diagnostic requirements for what they re-named idiopathic environmental intolerances (IEI):

the disease was acquired (not present from birth) and must produce multiple relapsing symptoms;
the symptoms must be closely related to "multiple environmental influences, which are well tolerated by the majority of the population"; and
it could not be explained by any other medical condition.In Japan, MCS is called chemical hypersensitivity or chemical intolerance (化学物質過敏症; kagaku bushitsu kabinsho), and the 1999 Japanese definition requires one or more of four major symptoms – headaches; malaise and fatigue; muscle pain; joint pain – combined with laboratory findings and/or some minor symptoms, such as mental effects or skin conditions. The defined lab findings are abnormalities in parasympathetic nerves, cerebral cortical dysfunction diagnosed by SPECT testing, visuospatial abnormalities, abnormalities of eye movement, or a positive provocation test. International Statistical Classification of Diseases
The International Statistical Classification of Diseases and Related Health Problems (ICD), maintained by the World Health Organization, is a medical coding system used for medical billing and statistical purposes – not for deciding whether any person is sick, or whether any collection of symptoms constitutes a single disease. The ICD does not list MCS as a discrete disease. However, this does not mean that people with MCS-related symptoms cannot be treated or billed for medical services.