Table 1

Serum antiprocine trypsin IgG concentrations (μg/ml). Values are means (SD) and range

Age	n	P-Tryp-IgG	Total IgG in g/l 1-154
Diagnosis (before enzymes)	10	2.9 (0.3), 1.6–4.3	95.3 (13.3), 41.9–130.8
1–6 months	9	7.2 (4.7), 1.6–40.1	116.8 (10.2), 85.3–150
7–12 months	10	69.4 (20.1)^†, 15.1–176	110.5 (20.9), 43.7–225
13–18 months	7	33.3 (6.4)^‡, 12.2–41	112.9 (22.8), 73.1–193.3
19–24 months	8	37.1 (11.8)^†, 6.5–111.6	142.5 (10.0), 122.2–155.9
25–30 months	8	35.51 (13.0)^*, 7.2–101.6	132.7 (6.9), 113.6–154.6
31–36 months	2	22.04 (2.56)^†, 19.5–24.6	Not done
37–48 months	7	11.82 (4.8)^*, 2.1–39.6	111.9 (13.9), 61.1–159.8
49–60 months	15	19.45 (5.6)^*, 3.3–73.4	128.7 (15.7), 72.1–218.8
60 + months	6	17.3 (9.6)^*, 3.9–62.5	127 (47.6), 79.4–174.6