TABLE 3.

Frequency Distribution and Cumulative Frequency of 6 Categories of Surgical Procedures Among Patients With Myelomeningocele SB, by Age; From the NSBR, 2009–2013 (Total = 17 265 Procedures)

Age, y	Gastrointestinal, n = 942 Procedures		Neurologic, n = 10 269 Procedures		Orthopedic, n = 2666 Procedures		Skin, n = 890 Procedures		Urologic, n = 1651 Procedures		Other, n = 847 Procedures
	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %
<1	9.7	10	53.1	53	10.2	10	17.8	18	4.4	4	29.3	29
1	2.2	12	5.0	58	10.0	20	1.4	19	3.9	8	16.8	46
2	1.7	14	3.9	62	8.7	29	1.9	21	3.2	12	10.5	57
3	2.6	16	3.4	65	8.3	37	2.8	24	3.6	15	7.1	64
4	5.8	22	3.1	69	8.1	45	3.8	28	6.1	21	7.8	72
5	6.5	29	2.8	71	6.6	52	4.3	32	7.0	28	5.3	77
6	8.5	37	2.6	74	7.4	59	2.9	35	8.5	37	4.4	81
7	6.1	43	2.3	76	6.0	65	2.4	37	7.1	44	3.5	85
8	6.5	50	2.5	79	5.1	70	3.4	41	6.4	50	3.7	88
9	5.9	56	2.0	81	4.8	75	4.3	45	6.1	56	1.8	90
10	6.2	62	2.0	83	5.1	80	5.1	50	5.8	62	2.0	92
11	5.4	67	2.1	85	4.8	85	5.6	56	5.2	67	1.1	93
12	6.1	73	2.6	87	4.1	89	8.1	64	6.5	74	1.1	94
13	3.8	77	2.2	90	3.1	92	4.5	68	5.8	80	1.5	96
14	3.2	80	1.8	91	2.2	95	6.4	75	2.7	82	1.2	97
15	3.2	83	1.5	93	1.8	96	4.2	79	3.0	85	0.7	98
16	2.8	86	0.9	94	1.3	98	2.7	82	2.7	88	0.7	99
17	3.4	90	0.9	95	0.6	98	4.4	86	3.3	91	0.7	99
18	1.7	91	0.6	95	0.6	99	2.4	88	1.9	93	0.5	100
19	1.9	93	0.8	96	0.5	99	2.4	91	1.2	94	0.1	100
20–24	3.9	97	1.9	98	0.8	100	3.9	95	3.7	98	0.1	100
>25	3.1	100	2.0	100	0.3	100	5.6	100	1.9	100	0.2	100

See a complete list of the surgical procedures by category in Table 1.