Table 2

Distribution of possible confounding variables according to HRT

		HRT^2-150		Difference (95% CI)
		yes	no	Difference (95% CI)
Number	55	420
Age
Median	61	68
Interquartile range	57–66	64–72
BMI^†
Median	27.5	28.2
Interquartile range	24.7–30.2	25.7–31.6
Age at menopause^‡
Median	51	50
Interquartile range	50–54	48–53
Prevalence of (%)
Current smoking	10.9	4.8	6.1 (−2.3 to 14.6)
Former smoking	18.2	18.8	−0.6 (−11.5 to 10.2)
Diabetes mellitus^§	1.8	10.5	−8.7 (−13.3 to −4.1)
Gout^¶	14.5	10.3	4.2 (−5.5 to 14.0)
Thiazide intake	14.4	19.8	−5.4 (−15.3 to 4.8)
Hysterectomy	41.8	27.6	14.2 (0.5 to 27.9)

↵2-150 Use of hormone replacement therapy. ^†Body mass index (kg/m²). ^‡Based on 347 women with available information on age at menopause. ^§History of diabetes or use of oral antidiabetics or insulin. ^¶History of gout or use of uricosurica/uricostatica.