Table 3.

Safe depth of 28 chest acupoints in different age groups.

Points	4–6 y/o	7–9 y/o	10–12 y/o	13–15 y/o	16–18 y/o	P value1	P value2
	(n = 79)	(n = 45)	(n = 30)	(n = 56)	(n = 109)
	Mean ± S.D.	Mean ± S.D.	Mean ± S.D.	Mean ± S.D.	Mean ± S.D.
CV22	19.32 ± 4.84	21.28 ± 7.47	25.53 ± 8.80	24.04 ± 6.67	23.80 ± 7.16	<0.001∗	<0.001∗
CV21	3.84 ± 0.73	4.66 ± 1.36	7.71 ± 6.24	6.56 ± 6.37	7.30 ± 4.84	<0.001∗	<0.001∗
CV20	4.06 ± 2.03	5.97 ± 4.77	7.29 ± 4.59	6.50 ± 3.34	7.61 ± 4.38	<0.001∗	<0.001∗
CV19	4.40 ± 1.87	5.41 ± 1.79	6.61 ± 3.44	6.31 ± 2.75	7.36 ± 4.56	<0.001∗	<0.001∗
CV18	4.38 ± 1.34	5.67 ± 2.82	7.01 ± 3.18	6.57 ± 3.02	8.26 ± 6.47	<0.001∗	<0.001∗
CV17	5.25 ± 4.63	5.76 ± 2.89	8.16 ± 4.31	7.20 ± 4.02	8.59 ± 5.53	<0.001∗	<0.001∗
CV16	6.16 ± 2.69	8.10 ± 3.04	10.68 ± 4.85	10.00 ± 4.24	12.08 ± 6.00	<0.001∗	<0.001∗
KI27	19.23 ± 4.22	24.19 ± 6.34	32.03 ± 6.97	29.55 ± 7.23	32.74 ± 11.34	<0.001∗	<0.001∗
KI26	12.50 ± 3.74	16.34 ± 5.53	20.14 ± 6.92	18.07 ± 6.01	20.83 ± 8.39	<0.001∗	<0.001∗
KI25	12.04 ± 3.89	14.67 ± 4.16	18.51 ± 6.03	17.25 ± 5.82	19.14 ± 6.83	<0.001∗	<0.001∗
KI24	11.19 ± 2.98	12.77 ± 3.64	16.25 ± 5.93	16.10 ± 4.51	17.78 ± 6.29	<0.001∗	<0.001∗
KI23	10.82 ± 3.22	12.81 ± 3.71	14.50 ± 5.80	14.75 ± 4.83	16.50 ± 6.54	<0.001∗	<0.001∗
KI22	9.17 ± 2.32	12.10 ± 3.43	15.79 ± 4.70	15.24 ± 4.62	16.96 ± 6.17	<0.001∗	<0.001∗
ST13	22.10 ± 9.51	29.11 ± 10.75	40.46 ± 11.63	37.80 ± 10.44	40.08 ± 15.33	<0.001∗	<0.001∗
ST14	14.57 ± 4.45	19.01 ± 7.21	27.94 ± 11.44	24.11 ± 7.39	26.58 ± 11.04	<0.001∗	<0.001∗
ST15	12.54 ± 3.87	17.12 ± 4.85	23.50 ± 10.64	20.58 ± 7.41	22.98 ± 10.53	<0.001∗	<0.001∗
ST16	11.43 ± 5.34	14.83 ± 6.21	19.14 ± 9.78	17.90 ± 7.12	18.98 ± 8.53	<0.001∗	<0.001∗
ST17	10.79 ± 3.72	12.77 ± 4.45	15.18 ± 7.01	15.83 ± 6.47	16.46 ± 7.43	<0.001∗	<0.001∗
ST18	10.55 ± 3.66	12.29 ± 4.21	14.93 ± 5.12	14.82 ± 5.39	16.31 ± 6.87	<0.001∗	<0.001∗
LU2	26.07 ± 10.14	30.96 ± 14.09	41.36 ± 17.92	43.03 ± 14.33	47.86 ± 17.85	<0.001∗	<0.001∗
LU1	19.35 ± 4.65	23.31 ± 8.82	31.06 ± 12.67	26.52 ± 9.34	30.30 ± 13.56	<0.001∗	<0.001∗
SP20	13.54 ± 4.75	17.97 ± 6.92	26.46 ± 12.50	21.86 ± 7.49	24.08 ± 10.77	<0.001∗	<0.001∗
SP19	12.06 ± 4.75	15.67 ± 6.21	19.14 ± 9.78	17.90 ± 7.12	20.23 ± 9.25	<0.001∗	<0.001∗
SP18	9.56 ± 4.41	13.54 ± 5.10	17.51 ± 5.03	16.79 ± 5.42	18.09 ± 6.66	<0.001∗	<0.001∗
SP17	11.42 ± 2.60	12.40 ± 2.98	14.73 ± 3.65	14.93 ± 5.01	15.72 ± 6.42	<0.001∗	<0.001∗
PC1	10.84 ± 4.25	14.23 ± 4.37	17.76 ± 5.53	16.45 ± 5.89	17.26 ± 6.80	<0.001∗	<0.001∗
GB23	12.15 ± 4.24	14.80 ± 4.90	18.83 ± 5.48	18.43 ± 5.43	19.79 ± 6.73	<0.001∗	<0.001∗
GB22	13.48 ± 7.19	16.95 ± 7.10	20.40 ± 6.83	21.51 ± 7.45	23.08 ± 7.77	<0.001∗	<0.001∗

The unit of mean ± S.D. is mm.

^∗Statistical significance.

¹One-way ANOVA test or Brown-Forsythe test.

²Two-way ANOVA test, adjusted P value after controlling sex.