Table 1.

Demographic data for patients with and without spinal curvature disorders

Variables	Spinal curvature disorders				P value
	With		Without
	n	%	n	%
Total	20 566	33.33	41 132	66.67
Gender					0.999
Male	7279	35.39	14 558	35.39
Female	13 287	64.61	26 574	64.61
Age group (years)					0.999
20–40	3107	15.11	6529	15.87
41–64	6597	32.08	13 386	32.54
≥65	10 862	52.82	21 217	51.58
No of comorbidities					<0.001
0	12 469	60.63	19 513	47.44
1	6074	29.53	12 021	29.23
≥2	2023	9.84	9598	23.33
Urbanisation level					<0.001
1 (The highest)	8147	39.61	14 344	34.87
2	7807	37.96	17 780	43.23
3	2021	9.83	2946	7.16
4 (The lowest)	2591	12.60	6062	14.74
Insurance premium (NT$)					<0.001
<18 000	20 193	98.19	40 541	98.56
18 000–34 999	324	1.58	482	1.17
≥35 000	49	0.24	109	0.27