Table 1. Distribution of age and BMI of breast cancer cases and controls used in the study.

Characteristics	Breast cancer cases (n = 2750)	Apparently healthy controls (n = 4472)
Median age in years at diagnosis/blood draw [range]	54 [22–92]	54 [35–78]
<40	192	343
40–50	710	1282
50–60	889	1538
60–70	635	1144
70–80	242	162
>80	64	0
Missing	18	3
Median body mass index (kg/m2) [25th–75th percentiles]	27.4 [24.1–31.4]	25.5 [22.7–29.3]
<18.5	20	41
18.5–24.99	663	1899
25–39.99	1359	2155
>40	112	148
Missing	596	229