Table 2. Age of Initial Diagnosis of Pediatric TF.

Age of initial diagnosis of pediatric TF	Boy	Girl	Boy + girl	Percentage among reference population* (%)	Percentage among TF population† (%)
0–1	439	271	710	0.033	5.6
1–2	1,338	1,645	2,983	0.137	23.4
2–3	1,515	1,899	3,414	0.156	26.8
3–4	1,219	1,314	2,533	0.116	19.9
4–5	663	756	1,419	0.065	11.1
5–6	358	433	791	0.036	6.2
6–7	202	222	424	0.019	3.3
7–8	120	134	254	0.012	2.0
8–9	68	68	136	0.006	1.1
9–10	36	29	65	0.003	0.5
Total	5,958	6,771	12,729	0.583	100.0

TF: trigger finger.

^*Reference population: total children born from 2011 to 2015 = 2,181,814 (see Table 3). ^†TF population: children who were diagnosed with pediatric TF = 12,729.