Demographic data
The majority of the women were married or cohabiting, had been born in
Sweden, had secondary or higher education and were gainfully employed.
Significant differences were seen concerning age and educational
background when comparing primiparae with multiparae. First time mothers
were younger and had lower education. Tobacco use decreased during
pregnancy among primiparae women but remained at a low level among
multiparae women, see Table 1.