Table 1

Results of the factor analysis of knowledge regarding hazards of smoking and passive smoking (secondhand smoking, SHS) (N=720)

Rotated factor pattern
Items	Factor 1 (uncommon knowledge)	Factor 2 (common knowledge)
Stroke	0.819*	0.287
Heart attack	0.794*	0.328
Impotence	0.816*	0.141
Premature ageing	0.816*	0.173
Heart attack in adults (SHS)	0.754*	0.311
Lung cancer	0.150	0.839*
Emphysema	0.430	0.639*
Yellow teeth	0.250	0.695*
Lung illnesses in children (SHS)	0.351	0.720*
Lung cancer in adults (SHS)	0.111	0.711*
% Variance	36.09	29.56