TY - JOUR
T1 - The Relation of Ambulatory Blood Pressure and Pulse Rate to Retinopathy in Type 1 Diabetes Mellitus. The Renin-Angiotensin System Study
AU - Klein, Ronald
AU - Moss, Scot E.
AU - Sinaiko, Alan R.
AU - Zinman, Bernard
AU - Gardiner, Robert
AU - Suissa, Samy
AU - Donnelly, Sandra M.
AU - Kramer, Michael S.
AU - Goodyer, Paul
AU - Strand, Trudy
AU - Mauer, Michael
PY - 2006/12
Y1 - 2006/12
N2 - Purpose: To examine the association of ambulatory blood pressure (ABP) and ambulatory pulse rate (APR) with diabetic retinopathy (DR) in persons with type 1 diabetes in the Renin-Angiotensin System Study (RASS), a multicenter primary diabetic nephropathy (DN) prevention trial. Design: Cross-sectional study. Participants: One hundred ninety-four normotensive RASS participants in 3 centers who are 16 years of age or older with type 1 diabetes mellitus (DM) of 2 to 20 years' duration. Methods: Ambulatory blood pressure and APR were monitored using standardized protocols. Patients were defined as nondippers if the night-to-day ratios for both systolic and diastolic blood pressures were >0.9. Diabetic retinopathy was determined by masked grading of 30° color stereoscopic fundus photographs of 7 standard fields using the Early Treatment Diabetic Retinopathy Study severity scale. Main Outcome Measure: Severity of DR. Results: No DR was present in 32%, mild nonproliferative DR (NPDR) was present in 55%, and moderate to severe NPDR or proliferative DR was present in 13% of the cohort. Neither 24-hour systolic ABP or diastolic ABP, daytime systolic or diastolic ABP, nor nighttime diastolic ABP were related to severity of DR. Statistically significant associations were found between nighttime systolic ABP and mean ABP and DR. Among those with no DR, 19% were nondippers; for those with mild NPDR, 28% were nondippers; and for those with severe NPDR or proliferative DR, 36% were nondippers (P = 0.08). The ratio of nighttime to daytime APR, but not the 24-hour APR or daytime or nighttime APR, was related positively to the severity of DR. In multivariable analyses, only the nighttime systolic ABP was related to severity of DR (P<0.05). Conclusions: These data suggest that ABP, especially during the night, may provide a better measure than clinical BP regarding the relationship of BP to the severity of retinopathy in normotensive persons with type 1 DM without clinical DN.
AB - Purpose: To examine the association of ambulatory blood pressure (ABP) and ambulatory pulse rate (APR) with diabetic retinopathy (DR) in persons with type 1 diabetes in the Renin-Angiotensin System Study (RASS), a multicenter primary diabetic nephropathy (DN) prevention trial. Design: Cross-sectional study. Participants: One hundred ninety-four normotensive RASS participants in 3 centers who are 16 years of age or older with type 1 diabetes mellitus (DM) of 2 to 20 years' duration. Methods: Ambulatory blood pressure and APR were monitored using standardized protocols. Patients were defined as nondippers if the night-to-day ratios for both systolic and diastolic blood pressures were >0.9. Diabetic retinopathy was determined by masked grading of 30° color stereoscopic fundus photographs of 7 standard fields using the Early Treatment Diabetic Retinopathy Study severity scale. Main Outcome Measure: Severity of DR. Results: No DR was present in 32%, mild nonproliferative DR (NPDR) was present in 55%, and moderate to severe NPDR or proliferative DR was present in 13% of the cohort. Neither 24-hour systolic ABP or diastolic ABP, daytime systolic or diastolic ABP, nor nighttime diastolic ABP were related to severity of DR. Statistically significant associations were found between nighttime systolic ABP and mean ABP and DR. Among those with no DR, 19% were nondippers; for those with mild NPDR, 28% were nondippers; and for those with severe NPDR or proliferative DR, 36% were nondippers (P = 0.08). The ratio of nighttime to daytime APR, but not the 24-hour APR or daytime or nighttime APR, was related positively to the severity of DR. In multivariable analyses, only the nighttime systolic ABP was related to severity of DR (P<0.05). Conclusions: These data suggest that ABP, especially during the night, may provide a better measure than clinical BP regarding the relationship of BP to the severity of retinopathy in normotensive persons with type 1 DM without clinical DN.
UR - http://www.scopus.com/inward/record.url?scp=33751519975&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33751519975&partnerID=8YFLogxK
U2 - 10.1016/j.ophtha.2006.06.003
DO - 10.1016/j.ophtha.2006.06.003
M3 - Article
C2 - 16996597
AN - SCOPUS:33751519975
SN - 0161-6420
VL - 113
SP - 2231
EP - 2236
JO - Ophthalmology
JF - Ophthalmology
IS - 12
ER -