A B S T R A C T Prospective studies inSkin infections with the Type 49 strain were followed by evidence of renal complications more often in children younger than 6.5 yr (9 of 21 or 43%) than in older children (1 of 21 or 5%). Attack rates of renal complications-after Type 49 skin infection were approximately equal in males and females.
The association between elevated blood pressure levels in adults and increased risk of coronary and cerebrovascular disease has been well documented.1,2 Prospective studies of blood pressure in both adults and children have also shown strongly positive tracking correlations,3-5 tracking correlations being defined as the relationship between blood pressure measurements obtained at two points in time from the same individuals.
In adults 35 to 70 years of age, tracking correlations of 0.6 for systolic pressure3,4 and 0.5 for diastolic pressure4 have been reported over four-year follow-up intervals. In children, Zinner et al.5 reported correlations of 0.25 for systolic pressure and 0.14 for diastolic pressure over a four-year follow-up interval.
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