Table 1.

Distribution of plasma insulin concentrations.

Age, years (n)Insulin, pmol/L
Mean (95% CI)Percentile (95% CI)
5th25th50th75th95th
Boys9 (342)29.4 (27.0–31.8)10.7 (9.5–11.6)17.9 (16.8–19.1)25.6 (23.9–27.1)35.0 (32.6–37.8)56.3 (52.0–77.8)
13 (370)50.0 (45.3–54.6)19.2 (16.0–20.6)28.8 (27.7–30.1)41.9 (39.0–45.2)60.0 (56.0–63.7)98.5 (88.7–119.4)
16 (375)46.9 (43.1–50.6)19.6 (17.6–21.7)29.5 (28.0–31.0)38.7 (37.5–40.4)50.7 (46.9–56.3)97.6 (86.5–121.9)
Girls9 (369)35.4 (30.2–40.7)12.0 (9.9–13.5)20.0 (19.1–22.1)29.0 (27.6–30.1)40.6 (37.3–43.2)61.1 (58.1–78.7)
13 (352)58.4 (53.8–63.1)25.4 (22.8–27.1)38.7 (36.3–41.0)51.1 (48.0–53.5)69.9 (65.3–74.0)114.4 (101.1–126.1)
16 (436)51.0 (48.5–53.6)22.4 (19.8–24.6)34.2 (32.5–36.4)46.4 (43.5–48.4)62.8 (59.0–68.4)95.1 (89.0–104.3)