Table 2.

Characteristics of primary biliary cirrhosis (PBC) and healthy women at time of blood sampling

	PBC patients (n = 36)	Healthy subjects (n = 36)
Age, years	60 ± 12 (34–87)	59 ± 13 (34–86)
Interval between blood sampling	30 ± 12 (6–60)	30 ± 14 (3–61)
and most recent son, years
Pregnancies
Male (n = 101)	1·4 ± 0·7 (1–4)	1·4 ± 0·6 (1–3)
Female (n = 47)	0·6 ± 0·8 (0–3)	0·8 ± 0·7 (0–2)
All children (n = 148)	2·0 ± 1·2 (1–6)	2·1 ± 0·9 (1–5)

Mean values ± s.d. (range).