Examining the spatiotemporal evolution of vaccine refusal: nonmedical exemptions from vaccination in California, 2000–2013

Table 2 Number and percent of observations disaggregated by years with enrollment and NME data

Years	School(n)	School(%)	BG(n)	BG(%)	Tract(n)	Tract(%)	SD(n)	SD(%)
1	653	6.84	267	3.51	111	1.99	11	1.34
2	411	4.31	198	2.60	69	1.24	7	0.85
3	321	3.36	151	1.98	68	1.22	5	0.61
4	323	3.38	164	2.15	64	1.15	4	0.49
5	250	2.62	148	1.94	70	1.26	2	0.24
6	268	2.81	141	1.85	79	1.42	5	0.61
7	241	2.53	133	1.75	61	1.09	5	0.61
8	278	2.91	163	2.14	83	1.49	5	0.61
9	289	3.03	201	2.64	100	1.79	4	0.49
10	280	2.93	202	2.65	111	1.99	5	0.61
11	237	2.48	185	2.43	100	1.79	6	0.73
12	297	3.11	234	3.07	142	2.55	11	1.34
13	695	7.28	533	7.00	340	6.10	49	5.98
14	5000	52.39	4892	64.27	4177	74.92	701	85.49
All	9543	100	7612	100	5575	100	820	100

Values are for Schools, Block Groups (BG), Tracts, and School Districts (SD). The row labeled All contains the total number of observations with at least one year of data within the study period (e.g., over 2000–2013, 9543 distinct schools reported at least one year of enrollment and exemption data). The number of observations (n) values represent counts (e.g., 653 schools reported only one year of data during the study period). The percent values represent the percent of All observations for that level of aggregation (e.g., 4.31% of the 9543 schools reported data for only two years of the study period)

ISSN: 1471-2458