Table 2.

Median age (months) at diagnosis by time period, 1980–2014

Period	N	Stages 1–3 and 4 aged <18 mo		Stage 4S		Stage 4 aged >18 mo		All
		Median	Min–max	Median	Min–max	Median	Min–max	Median	Min–max
1980–84	334	13.0	0–207	1.6	0.1–8	40.0	19.4–242	22.7	0–242
1985–89	413	13.3	0–231	2.0	0–15	38.6	18.2–143	19.0	0–231
1990–94	653	11.8	0–232	1.9	0–11	39.6	18.2–215	17.8	0–232
1995–99	820	13.5	0–206	2.1	0–11	43.5	18.3–250	15.1	0–250
2000–04	715	11.4	0–253	2.9	0–10	40.8	18.8–247	15.0	0–253
2005–09	684	11.4	0–248	3.9	0–16	42.1	18.3–255	16.1	0–255
2010–14	665	10.3	0–306	2.7	0–12	39.2	18.4–251	15.1	0–306
All	4284	12.2	0–306	2.5	0–16	40.6	18.2–255	16.1	0–306
Jonckheere–Terpstra test		P < 0.001		P = 0.005		P = 0.947		P < 0.001