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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