High prevalence of undiagnosed diabetes and abnormal glucose tolerance in the Iranian urban population: Tehran Lipid and Glucose Study

Table 4 Number needed to screen for undiagnosed diabetes in various risk factor categories among the Tehranian adults.

Variables	Men		Women
	NNTS^a	95% CI	NNTS^a	95% CI
Family history of diabetes (yes)	15.6	14.0–17.7	13.7	12.5–15.1
Blood pressure ≥ 140/90 mmHg	8.3	7.7–9.1	9.3	8.7–10.1
BMI ≥ 25 kg/m²	13.5	12.1–15.1	15.5	14.1–17.3
Abdominal obesity: waist circumference (cm)>102 in men and > 88 in women	8.0	8.4–8.7	12.5	11.5–13.8
Triglycerides > 2.8 mmol/l	10.8	9.8–11.9	7.8	7.3–8.4
HDL-C< 0.9 mmol/l	19.2	17.0–22.1	17.0	15.4–19.0

a: Number needed to screen (95% confidence interval) was obtained by univariate logistic regression analysis.
BMI: body mass index, CI: confidence interval, HDL-C: high-density lipoprotein cholesterol,

ISSN: 1471-2458