private void CalculateRiskAssessment()
        {
            if (!RiskAssessmentIsValid)
            {
                RiskAssessmentLevel = 8;
                RiskAssessmentLevelString = "---%";
                RiskAssessmentLevelRange = "---";
                return;
            }

            var risk = Calculator.CalculateRisk(Gender.DataValue, Age.DataValue,
                                     Model.RiskAssessment.SmokedPrevious12months, Model.RiskAssessment.Diabetes,
                                     SystolicBP.DataValue, DiastolicBP.DataValue,
                                     RiskAssessmentTotalCholesterol.DataValue, RiskAssessmentHDLC.DataValue);

            switch (risk)
            {
                case Calculator.CardiovascularRiskPercentage.LessThanTwoPointFivePercent:
                    RiskAssessmentLevel = 7;
                    RiskAssessmentLevelString = "<2.5%";
                    RiskAssessmentLevelRange = "MILD";
                    break;
                case Calculator.CardiovascularRiskPercentage.TwoPointFiveToFivePercent:
                    RiskAssessmentLevel = 6;
                    RiskAssessmentLevelString = "2.5%-5%";
                    RiskAssessmentLevelRange = "MILD";
                    break;
                case Calculator.CardiovascularRiskPercentage.FiveToTenPercent:
                    RiskAssessmentLevel = 5;
                    RiskAssessmentLevelString = "5%-10%";
                    RiskAssessmentLevelRange = "MILD";
                    break;
                case Calculator.CardiovascularRiskPercentage.TenToFifteenPercent:
                    RiskAssessmentLevel = 4;
                    RiskAssessmentLevelString = "10%-15%";
                    RiskAssessmentLevelRange = "MODERATE";
                    break;
                case Calculator.CardiovascularRiskPercentage.FifteenToTwentyPercent:
                    RiskAssessmentLevel = 3;
                    RiskAssessmentLevelString = "15%-20%";
                    RiskAssessmentLevelRange = "HIGH";
                    break;
                case Calculator.CardiovascularRiskPercentage.TwentyToTwentyFivePercent:
                    RiskAssessmentLevel = 2;
                    RiskAssessmentLevelString = "20%-25%";
                    RiskAssessmentLevelRange = "VERY HIGH";
                    break;
                case Calculator.CardiovascularRiskPercentage.TwentyFiveToThirtyPercent:
                    RiskAssessmentLevel = 1;
                    RiskAssessmentLevelString = "25%-30%";
                    RiskAssessmentLevelRange = "VERY HIGH";
                    break;
                case Calculator.CardiovascularRiskPercentage.GreaterThanThirtyPercent:
                    RiskAssessmentLevel = 0;
                    RiskAssessmentLevelString = ">30%";
                    RiskAssessmentLevelRange = "VERY HIGH";
                    break;
                default:
                    RiskAssessmentLevel = 8;
                    RiskAssessmentLevelString = "---%";
                    RiskAssessmentLevelRange = "---";
                    break;
            }
        }