Table 2:

Sex-specific percentiles in the different age groups

	Women (n = 527)					Men (n = 469)
	1st	5th	50th	95th	99th	1st	5th	50th	95th	99th
Midbrain area
50–54 yr (n = 121/91)	93	111	142	178	207	104	113	141	183	222
55–59 yr (n = 187/159)	101	110	137	174	196	95	107	140	176	195
60–66 yr (n = 219/219)	88	102	130	166	178	88	101	130	166	184
Pons area
50–54 yr (n = 121/91)	405	431	517	591	616	417	478	565	670	703
55–59 yr (n = 187/159)	414	456	517	608	642	458	480	567	678	785
60-66 yr (n = 219/219)	413	436	516	610	664	443	476	565	659	689
MCP width
50–54 yr (n = 121/91)	7.9	8.2	9.4	10.6	11.3	8.0	8.2	9.7	11.3	11.9
55–59 yr (n = 187/159)	7.7	8.1	9.2	10.4	10.8	7.5	8.6	9.8	11.2	12.2
60–66 yr (n = 219/219)	7.2	7.6	9.0	10.5	10.9	7.7	8.4	9.7	11.0	11.7
SCP width
50–54 yr (n = 121/91)	2.6	3.1	3.7	4.5	5.1	2.5	3.2	3.9	4.7	5.5
55–59 yr (n = 187/159)	2.8	3.1	3.8	4.5	4.9	2.8	3.1	4.0	4.7	4.8
60–66 yr (n = 219/219)	2.7	2.9	3.7	4.5	4.9	2.9	3.2	4.0	4.8	5.2
M/P ratio
50–54 yr (n = 121/91)	0.21	0.22	0.28	0.34	0.38	0.18	0.21	0.25	0.32	0.36
55–59 yr (n = 187/159)	0.20	0.21	0.27	0.32	0.37	0.16	0.18	0.25	0.30	0.32
60–66 yr (n = 219/219)	0.17	0.19	0.26	0.32	0.33	0.17	0.18	0.23	0.29	0.30
MRPI
50–54 yr (n = 121/91)	6.2	6.7	9.0	12.5	13.6	6.1	7.6	9.4	13.6	16.5
55–59 yr (n = 187/159)	5.6	7.2	9.2	12.2	14.0	7.3	7.8	10.1	14.8	17.1
60–66 yr (n = 219/219)	6.7	7.1	9.5	13.2	15.3	6.8	8.0	10.6	14.5	17.1

Note:—n = X/Y: X women and Y men.