Table 3.

Regional incidences of idiopathic scoliosis in males and females.

	Total Population		Idiopathic Scoliosis Patients		Urban to Rural Ratio		Incidence (Per 100,000 Population)
	Urban	Rural	Urban	Rural	Ratio (95% CI)	p-Value	Urban	Rural
Male (years old)
Total	19,429,181	8,595,539	86,521	28,640	1.335 (1.317–1.353)	<0.0001	445	333
0–2	2,480,836	1,440,580	806	244	1.918 (1.662–2.213)	<0.0001	32	17
3–9	5,772,199	3,373,735	12,072	3532	1.996 (1.922–2.072)	<0.0001	209	105
10–14	5,058,018	2,271,404	34,618	11,150	1.392 (1.362–1.422)	<0.0001	684	491
15–19	6,118,128	2,739,247	39,025	13,714	1.272 (1.248–1.297)	<0.0001	638	501
10–19	11,176,146	5,010,651	73,643	24,864	1.326 (1.307–1.345)	<0.0001	659	496
Female (years old)
Total	17,969,602	7,779,341	112,358	39,764	1.222 (1.208–1.236)	<0.0001	625	511
0–2	2,349,110	1,250,804	708	217	1.737 (1.492–2.022)	<0.0001	30	17
3–9	5,411,867	2,904,967	11,798	3460	1.829 (1.761–1.899)	<0.0001	218	119
10–14	4,655,069	2,062,308	51,510	18,054	1.261 (1.240–1.283)	<0.0001	1107	875
15–19	5,553,556	2,378,228	48,342	18,033	1.147 (1.127–1.166)	<0.0001	870	758
10–19	10,208,625	4,440,536	99,852	36,087	1.202 (1.187–1.216)	<0.0001	978	813