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Table 1 Demographic, behavioural, socio-economic, and anthropometric characteristics of sample.

From: Body mass index, sexual behaviour, and sexually transmitted infections : an analysis using the NHANES 1999–2000 data

Covariable

Male Mean/N1/N2/N3

Female Mean/N1/N2/N3

N

979

1250

Age (sd)

34.43 (8.49)

33.60 (8.53)

Partners last 12 months (sd)

1.54 (2.88)

1.03 (1.27)

Partners life (sd)

18.18 (57.76)

6.07 (29.14)

Age at first sex (sd)

16.39 (3.31)

17.42 (3.34)

African American (n/y)

776/203

990/260

Mexican American (n/y)

693/286

886/364

Regular Partner (n/y)

350/517

449/670

BMI (class 1/2/3)

360/363/247

434/352/452

Height (sd)

1.75 (.08)

1.62 (.07)

Income >20,000$ (n/y)

168/690

237/844

N of weekly drinks (sd)

11.30 (19.93)

6.88 (18.59)

Current smoking (n/y)

660/315

1003/246

Ever smoked (n/y)

490/486

816/433

HSV-2 antibodies (n/y)

752/143

806/333

Education (<high school/high school/high school)

330/233/414

353/300/594