The educational gradient in cardiovascular risk factors: impact of shared family factors in 228,346 Norwegian siblings

Table 2 Variation in educational level and cardiovascular risk factors within sibships and between individuals in the cohort

	Cohort	Cohort	Within sibships
	Mean level	Standard deviation	Standard deviation
Educational level (1–5 levels)	2.5	±0.9	±0.7
Systolic blood pressure (mmHg)	129	±13	±6
Diastolic blood pressure (mmHg)	77	±9	±5
Heart rate (beats/min)	75	±12	±5
Total cholesterol (mmol/l)	5.6	±0.9	±0.6
BMI (kg/m²)	25.0	±3.1	±1.8
Height (cm)	172	±8	±4
Daily smoking (daily smoking coded as 0–1)	0.4	±0.4	±0.2
SCORE (percentage points)	0.6	±0.7	±0.2

Educational levels 1–5: (1) up to 7–9 years; (2) 10–11 years; (3) 12 years (4) 13–16 years; (5) >16 years
SCORE is the Systematic COronary Risk Evaluation risk prediction score of 10-year cardiovascular mortality

ISSN: 1471-2458