Table 3.

Factors associated with age difference between the individuals and those that were contacted, results of multivariate analysis of most parsimonious model.

a)
variable	level	coefficient	95% Confidence interval	p-value
constant		10.20	(7.56, 12.84)	<0.001
intensity	Physical only	baseline
	Conversation only	-1.10	(-3.64, 1.44)
	Conversation & physical	-4.73	(-7.32, -2.13)
	"Sexual" contact	-7.75	(-11.92, -3.58)	<0.001
b)
variable	Level	coefficient	95% Confidence interval	p-value
constant		1.58	(0.60, 2.55)	0.002
Place of contact	Home	baseline
	College	5.28	(3.92, 6.64)
	Travel	7.30	(5.22, 9.38)
	Shop	13.81	(12.24, 15.38)
	Social	2.34	(1.09, 3.59)
	Other	5.19	(3.36, 7.03)	<0.001

Note: contact, individual and day of week, were random effects, intensity and place of contact were modelled as fixed effects. Degrees of freedom = 1783 and 1776 for Table 2a and b respectively.