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. 1998 Jun 20;316(7148):1858–1863. doi: 10.1136/bmj.316.7148.1858

Table 1.

Characteristics of the participants and number of subjects providing information. Values are means (SD) unless indicated otherwise

 Cases
 Controls
Characteristic No (%) responding Mean (SD) No (%) responding Mean (SD)
Age (years) 1327 72.5 (6.8) 3262 70.5 (7.7)
Age at menopause (years) 1327 50.0 (4.4) 3262 49.8 (4.2)
Age at menarche (years)  948 13.8 (1.5) 2618 13.6 (1.5)
Weight (kg) 1308  61.0 (11.1) 3233  66.8 (11.8)
Height (m) 1307  1.64 (0.07) 3235  1.63 (0.06)
Body mass index (kg/m2) 1294 22.2 (3.8) 3216 24.6 (4.2)
No (%) ever used postmenopausal oestrogen* 371 (28) 1189 (36.5)
Mean duration of use of hormone replacement therapy among ever users (months):
 Any 120 (9.0) 60.5 (73.3) 456 (14.0) 67.5 (79.9)
 Without progestins  81 (6.1) 60.8 (65.8) 229 (7.0)  64.9 (84.0)
 With progestins  56 (4.2) 43.6 (52.7) 274 (8.4)  59.0 (66.1)
 With progesterone-like progestins  14 (1.1) 38.5 (33.9) 94 (2.9) 78.0 (73.1)
 With testosterone-like progestins  45 (3.4) 50.0 (58.0) 222 (6.8)  56.0 (59.7)
 With cyclic progestins  38 (2.3) 46.9 (47.7) 167 (5.1)  70.0 (70.1)
 With continuous progestins  23 (1.7) 45.7 (60.3) 138 (4.2)  64.3 (61.2)
*

Including oral or local treatment with oestriol or unspecified oestrogens.  

Medium potency oestrogens such as oestradiol compounds or conjugated oestrogens.