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Table 1 Age-specific relative risks of stroke occurrence due to raised systolic blood pressure (SBP) and body mass index (BMI) (GBD 2010 study estimates for South Africa, Amy VanderZanden - personal communication)

From: Burden of stroke attributable to selected lifestyle risk factors in rural South Africa

Risk factor RR 25–29 30–34 35–39 40–44 45–49 50–54 55–59 60–64 65–69 70–74 75–79 80+
SBP RR for 10 mmHg increase 2.17 2.07 1.97 1.88 1.8 1.71 1.64 1.56 1.49 1.42 1.36 1.26
RR for 1 mmHg increase 1.08 1.08 1.07 1.07 1.06 1.06 1.05 1.05 1.04 1.04 1.03 1.02
95 % CI (2.03–2.31) (1.95–2.20) (1.87–2.09) (1.79–1.99) (1.71–1.89) (1.64–1.79) (1.57–1.71) (1.50–1.62) (1.44–1.54) (1.38–1.46) (1.32–1.39) (1.24–1.29)
BMI RR for 5 kg/m2 increase 1.88 1.81 1.74 1.68 1.61 1.55 1.49 1.44 1.38 1.33 1.28 1.21
RR for 1 kg/m2 increase 1.13 1.13 1.12 1.11 1.10 1.09 1.08 1.08 1.07 1.06 1.05 1.04
95 % CI (1.69–2.08) (1.64–1.99) (1.59–1.91) (1.54–1.82) (1.49–1.74) (1.45–1.67) (1.40–1.60) (1.36–1.53) (1.31–1.46) (1.27–1.40) (1.23–1.33) (1.17–1.25)