Table 3 Results of the random intercept model including individual level and SSD level parameters.

Parameter	No partners		Two partners		Three or more partners
	Odds ratio	95% CI	Odds ratio	95% CI	Odds ratio	95% CI
Individual level parameters
Age	1.032	1.029 to 1.036	0.989	0.983 to 0.995	0.970	0.965 to 0.974
Age2§	1.005	1.005 to 1.005	1.000	1.000 to 1.001	1.001	1.000 to 1.001
Gender
Male	1
Female	1.141	1.069 to 1.218	0.676	0.614 to 0.745	0.359	0.327 to 0.395
Marital status
Married	1
Separated/divorced/ widowed/never married	47.068	41.754 to 53.059	12.089	10.658 to 13.712	19.402	16.621 to 22.649
Current sexual identity
Heterosexual	1
Homosexual	85.030	59.169 to 122.193	0.234	0.094 to 0.587	0.174	0.064 to 0.473
Bisexual	1.665	1.275 to 2.174	1.426	0.935 to 2.176	2.018	1.473 to 2.764
Same sex activity in last year
None	1
Some	1.703	1.288 to 2.252	3.448	2.254 to 5.275	4.155	2.830 to 6.101
SSD level parameters
Median age	1.003	0.979 to 1.029	0.991	0.968 to 1.016	1.066	1.043 to 1.090
Ratio of over 59 to under 16 (%)	1.001	1.000 to 1.001	1.000	0.999 to 1.001	1.002	1.001 to 1.003
Sex ratio (%male)	0.917	0.894 to 0.941	0.981	0.955 to 1.007	0.954	0.925 to 0.984
Separated/divorced/widowed/ never married (%)	0.987	0.977 to 0.997	0.998	0.987 to 1.009	1.026	1.015 to 1.037
Any same sex activity in last year (%)	1.056	1.038 to 1.075	1.024	1.008 to 1.040	1.002	0.987 to 1.018
More than five opposite sex partners in last year (%)	1.009	0.985 to 1.033	1.005	0.978 to 1.032	1.123	1.101 to 1.146
Intercept	0.088	0.016 to 0.491	0.069	0.011 to 0.436	0.006	0.001 to 0.041
SSD variance	0.096	0.049 to 0.144	0.040	0.003 to 0.0760	0.056	0.014 to 0.097

§Calculated as the square of the difference between age and the mean age of the entire sample

Having one partner is the reference category and is omitted.