Table 1

Characteristics of participants included in primary analyses of anthropometry by menopause type (n=915)

Natural menopause n=675 (n=672, 99.6% pre-menopausal at age 36 years (first measure of WC/BMI))Hysterectomy n=240 (n=215, 89.6% pre-menopausal at age 36 years (first measure of WC/BMI))
n (%)n (%)
Household social class
 Professional/intermediate256 (37.9)76 (31.7)
 Skilled (non-manual)241 (35.7)80 (33.3)
 Skilled manual and partly skilled132 (19.6)70 (29.2)
 Unskilled46 (6.8)14 (5.8)
Parity
 0100 (14.8)15 (6.3)
 1 or 2379 (56.2)130 (54.2)
 3 or more196 (29.0)95 (39.6)
Current smoking at age 36233 (34.5)91 (37.9)
Physical activity at age 36
 Inactive275 (40.7)110 (45.8)
 Less active167 (24.7)53 (22.1)
 Most active233 (34.5)77 (32.1)
HRT use
 Age 364/652 (0.6)5/235 (2.1)
 Age 4315/623 (2.4)17/228 (7.5)
 Age 5391/512 (17.8)101/174 (58.1)
 Age 60–649/498 (1.8)22/173 (12.7)
 Age 698/465 (1.7)8/168 (4.8)
Mean age at menarche (SD)13.1 (1.3)12.9 (1.1)
Mean age at period cessation (SD)51.5 (3.9)44.1 (6.2)
  • BMI, body mass index; HRT, hormone replacement therapy; WC, waist circumference.