TABLE 4.

Frequency Distribution and Cumulative Frequency of 6 Categories of Surgical Procedures Among Patients With Nonmyelomeningocele SB, by Age; From the NSBPR, 2009–2013 (Total = 1626 Procedures)

Age, y	Gastrointestinal, n = 134 Procedures		Neurologic, n = 864 Procedures		Orthopedic, n = 270 Procedures		Skin, n = 99 Procedures		Urologic, n = 172 Procedures		Other, n = 87 Procedures
	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %	Frequency, %	Cumulative Frequency, %
<1	40.3	40	52.8	53	6.3	6	25.3	25	13.4	13	20.7	21
1	7.5	48	8.2	61	5.2	12	1.0	26	5.8	19	13.8	35
2	0.8	49	4.1	65	5.9	17	1.0	27	8.1	27	10.3	45
3	5.2	54	2.7	68	7.8	25	5.1	32	4.1	31	11.5	56
4	4.5	58	3.0	71	8.2	33	4.0	36	8.1	40	9.2	66
5	3.7	62	2.8	74	7.0	40	2.0	38	11.6	51	6.9	72
6	4.5	67	2.3	76	3.7	44	3.0	41	6.4	58	3.5	76
7	3.0	70	3.6	80	4.8	49	2.0	43	5.2	63	6.9	83
8	5.2	75	1.6	81	5.2	54	0.0	43	7.6	70	4.6	87
9	3.7	78	3.6	85	5.2	59	2.0	45	2.3	73	1.2	89
10	6.0	84	2.8	88	4.8	64	4.0	49	2.9	76	3.5	92
11	0.8	85	2.4	90	8.2	72	6.1	56	2.3	78	1.2	93
12	2.2	87	1.3	91	8.2	81	6.1	62	4.7	83	2.3	96
13	1.5	89	1.3	93	5.6	86	4.0	66	2.3	85	0.0	96
14	0.0	89	1.0	94	3.3	89	5.1	71	1.1	86	1.2	97
15	2.2	91	0.7	94	1.9	91	6.1	77	8.7	95	2.3	99
16	0.0	91	1.5	96	1.5	93	6.1	83	1.2	96	0.0	99
17	0.8	92	1.5	97	2.2	95	5.1	88	1.7	98	0.0	99
18	0.8	93	0.5	98	0.0	95	9.1	97	1.2	99	0.0	99
19	0.0	93	0.6	98	3.0	98	1.0	98	0.0	99	1.2	100
20–24	5.2	98	0.5	99	1.9	100	2.0	100	1.2	100	0.0	100
>25	2.2	100	1.4	100	0.4	100	0.0	100	0.0	100	0.0	100

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