Stanhope, J. M., and Prior, I. A. M. (1975). Annals ofthe Rheumatic Diseases, 34,359-363. Uric acid, joint morbidity, and streptococcal antibodies in Maori and European teenagers. Rotorua Lakes study 3. Two hundred and ninety-four New Zealand secondary school students were examined by questionnaire, and physical and biochemical methods. The sample contained almost equal numbers of Maoris and Europeans. The findings related to joint conditions are presented. Past injury and rheumatic disease accounted for some of the reported morbidity, but no important sex or race differences in these factors emerged. There were, however, significant differences in serum uric acid levels with the Maori having higher levels than the Europeans. A significant correlation with body mass was present in both race and sex groups but a correlation with haemoglobin was present only in the European females. While hyperuricaemia was not associated with morbidity in this young sample, ethnic differences anticipated the higher prevalence of gout already observed in Maori men. i Studies among New Zealand Maori and European adults have shown significantly higher serum uric acid levels and rates of clinical gout in the Maori (Rose and Isdale, 1963; Rose and Prior, 1963; Prior and Rose, 1966;Evans, Prior, and Morrison, 1969). This predisposition to hyperuricaemia and gout is associated with high rates of obesity, hyperglycaemia, and hypertriglyceridaemia, and represents a complex metabolic problem which contributes to morbidity and mortality in Maori adults (Prior, Rose, Harvey, and Davidson, 1966).The present study was undertaken in a New Zealand secondary school, which contained almost equal numbers of Maori and Europeans aged 13 to 16 years, to find out if ethnic differences similar to those seen in adults could be shown in serum uric acid concentration, joint symptoms, smoking habits, respiratory health, and coronary risk factors including lipid levels. Serum uric acid levels are reported.In addition we present data relating to joint conditions in the sample, examining the quantity and distribution ofjoint symptoms and signs, with a view to estimating the contribution of rheumatic, hyperuricaemic, and traumatic components to joint morbidity. Rheumatic fever and rheumatic heart disease have a notably higher morbidity and mortality rate in Maori than in Europeans (Stanhope, 1975) and are presumably related to a higher rate of streptococcal infection or to the presence of some other conditioning factors. The antistreptolysin 0 and antihyaluronidase titres were estimated to detect race differences.In a previous paper we described smoking habits, respiratory health, and related variables (Stanhope and Prior, 1975a), and the differences in the pattern of coronary risk factors will also be reported (Stanhope and Prior, 1975b