Original Scientific Paper Blood pressure, serum total cholesterol and contraceptive pill use in 17-year-old girls

Background Many studies have analysed the relation between cardiovascular risk factors and oral contraceptive use in adult women, whereas information on the possible health effects of oral contraceptive use during adolescence is lacking. Design The effect of current contraceptive pill use on blood pressure and serum total cholesterol concentration was studied in a cross-sectional sample of 120 adolescent girls with a mean age of 17.4 years. Methods After the girls had rested for 5 minutes in the sitting position, trained study nurses measured blood pressure three times consecutively using a mercury sphygmomanometer. The nurses also administered a questionnaire gathering information on the use of oral contraceptives, smoking and parental social class. In the morning blood samples were taken for the measurement of serum total cholesterol. Results Mean age (±SD) was 17.4 ±0.8 years. Blood pressure averaged ( ±SD) 108.7±9.9 systolic and 68.0±8.2mmHg diastolic. Serum total cholesterol was 4.5 ±0.7mmol/l. Forty-nine girls (41%) were taking the contraceptive pill. Of these, 44 (90%) were on a combination of ethinyloestradiol (20–35 lg) and a progestogen, four (8%) on anti-androgens (35 lg) and one (2%) only on a progestogen. After adjustment for age, body mass index, smoking and alcohol status systolic blood pressure was 4.6mmHg higher (95 % CI 1.2–8.1; P<0.001) in current pill users than in girls not currently on the pill (111.4 versus 106.8mmHg). Adjusted for the aforementioned covariates, diastolic blood pressure was not related to pill use (68.