Application of cold intolerance symptom severity questionnaire among vibration-exposed workers as a screening tool for the early detection of hand-arm vibration syndrome: a cross-sectional study

BACKGROUND: The detection rate of hand-arm vibration syndrome (HAVS) is very low in South Korea compared with other countries. The absence of uniform consensus and guidelines for diagnosing HAVS has been presumed to be one of the reasons. The HAVS has various manifestations including cold intolerance and its severity can be measured using the cold intolerance symptom severity (CISS) questionnaire. This study aimed to determine whether the CISS questionnaire, being used as a screening tool, can aid in the early detection of HAVS. METHODS: A total of 76 male workers with vibration-induced symptoms were enrolled as the final study participants. To compare the CISS score of healthy individuals, 41 men who had never been exposed to local vibration were included in the study. In addition to the former medical questionnaire, the participants answered the CISS questionnaire. A statistical analysis was conducted to identify the association of CISS scores with vibration induced symptom and to determine its cut off value. RESULTS: The reliability of the CISS questionnaire was proven to be good, with a total Cronbach's alpha of 0.922. The mean CISS score of the exposed group increased in every vascular stage [stage 0 = 42.6 (18.5); stage 1 = 59.4 (14.1); and over stage 2 = 60.2 (21.6)]. They were significantly higher than that of the non-exposed group. The result was fairly consistent with those in the sensorineural stage. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and area under curve (AUC) of 30 were 88.5, 65.3, 76.1, 82.1 and 0.769, respectively. From the result of logistic regression, the adjusted odds ratio of both components increased by the CISS score grouped by 30s. CONCLUSIONS: The self-reported CISS questionnaire, used to measure the degree of cold intolerance, showed high agreement with the Stockholm classification of HAVS. Hence, we recommend the use of this questionnaire to assess the level of cold intolerance among vibration-exposed workers and detect individuals who are at risk of vibration-induced impairment with a cutoff value of 30. TRIAL REGISTRATION: IRB No. 2018–07–040-001. Registered on 4 September 2018.

<b>A Case of Prolonged Lumbago with Severe Cold Intolerance Successfully Treated with Keppuchikuoto and Uzushakusekishigan </b> / 日本東洋医学雑誌

We report a case of prolonged lumbago with severe cold intolerance successfully treated with keppuchikuoto and uzushakusekishigan. The patient was a 71-year-old female with lumbar spinal canal stenosis which was refractory to several nerve and intervertebral disc block therapies and oral medications. She had been also suffering from constipation, leg cramps, intermittent chest pains, and severe cold intolerance. We prescribed keppuchikuoto for chronic blood stagnation and deficiency and uzushakusekishigan for intermittent chest pains in order to improve those symptoms all together. The severity of her lumbago and severe cold intolerance were remarkably reduced after the administration of the two formulas. This case suggests that the two formulas exerted their effectiveness by ameliorating chronic severe cold intolerance, blood stagnation, and blood deficiency and resulted in remarkable improvement in lumbago.