Table 4.

Sensitivity analysis

Variable	Excluding subjects who received a diagnosis of prostate cancer within 6 months following the index date		Excluding subjects who received a diagnosis of prostate cancer within 1 year following the index date
	Subjects with sexuallytransmitted infections No. (%)	Comparisonsubjects No. (%)	Subjects with sexuallytransmitted infections No. (%)	Comparisonsubjects No. (%)
Five-year follow-up period
Presence of prostate cancer	15 (1·43)	78 (0·74)	13 (1·24)	68 (0·65)
Crude hazard ratio† (95% CI)	1·81 (1·03–3·21)	1·00	1·93* (1·06–3·51)	1·00
Adjusted hazard ratio‡ (95% CI)	1·70* (1·01–3·01)	1·00	1·83* (1·01–3·33)	1·00

CI, Confidence interval.

^†Hazard ratio was calculated by the stratified Cox regression model (stratified on age group and the year of index date).

^‡Adjustments are made for patients' geographical location, urbanization level, monthly income, history of vasectomy, hypertension, diabetes, hyperlipidaemia, obesity, tobacco use disorder, and alcohol abuse/alcohol dependence syndrome.

^*P < 0·05.