Table 2.

Age and the OC2A and POCA values in healthy group

	20 + (n = 30†)	30 + (n = 30†)	40 + (n = 30†)	50 + (n = 30†)	60 + (n = 30†)	F value	P value
OC2A (°, Mean ± SD)	15.3 ± 4.1	15.2 ± 3.0	13.9 ± 3.8	13.2 ± 3.9	14.7 ± 3.4	1.836	0.125
POCA (°, Mean ± SD)	110.5 ± 7.3	108.4 ± 7.9	109.5 ± 8.2	108.6 ± 7.0	103.8 ± 8.6*	3.221	0.014*

OC2A, occipitoaxial angle; POCA, posterior occipitocervical angle.

^* Statistically significant and the POCA over 60‐year‐old was smaller than other age groups.

^† Combination of male and female in the same age group.