Table 2.

Associations of the sickness index and covariates with each variable related to sexual life and reproduction. This table shows the results (standardised beta coefficients) of eleven univariate GLM analyses (Type III sums of squares) analysing associations between variables related to sexual life and reproduction (first column) and the sickness index and covariates. In accordance with the preregistration, each model includes only covariates with Kendall’s Tau > 0.02 or < − 0.02 for correlation with output variables (see Supplementary Table S3). Current partnership and church membership were treated as binary variables with 0 indicating no current partnership and no church membership, and 1 indicating being in a partnership and church membership. A positive beta therefore means that for example subjects currently in a partnership score higher on a particular variable. Associations with p values under 0.05 are in bold and those with p values under 0.005 are marked with asterisks.

	Age	Socioeconomic status	Current partnership	Height	Size of place of residence	Education	Church membership	Sickness index	Sickness index–age interaction
Women
Age at menarche	0.115*			0.116*		0.018		− 0.093*	− 0.013
Age at first sexual intercourse	0.122*		− 0.109*	0.028*		0.250*	0.339*	0.004	0.038
Sexual desire	− 0.155*	− 0.013	− 0.563*			0.003	− 0.190*	0.125*	− 0.056*
Sexual activity	− 0.165*	− 0.008	0.963*	0.025*				− 0.096*	− 0.098*
Number of sexual partners	− 0.110*		− 0.047	0.033*	0.027		− 0.209*	− 0.044	− 0.106*
Number of children	0.708*		0.286*	0.002		− 0.070*	0.128*	− 0.076*	− 0.077*
Men
Age at first sexual intercourse	0.106*		− 0.135*		− 0.045*	0.207*	0.188*	0.062*	0.014
Sexual desire	− 0.121*		− 0.218*			0.012	− 0.099*	0.140*	− 0.054*
Sexual activity	− 0.090*	0.019	1.005*	0.023*			− 0.107*	− 0.158*	− 0.043
Number of sexual partners	− 0.015	0.038*	0.211*	0.020	0.017		− 0.145*	− 0.058*	− 0.024
Number of children	0.628*	0.022*	0.422*		− 0.020*	− 0.014	0.162*	− 0.041*	− 0.109*