Table 2.

Prevalence of fourth cranial nerve palsy in the general Korean population in 2006–2015.

Year	Annual total population	Total			Male			Female			Surgery of FNP
		No.	Prevalence	95% CI	No.	Prevalence	95% CI	No.	Prevalence	95% CI	No.	Prevalence	95% CI
2006	1021208	35	3.43	2.41, 4.69	25	4.89	3.21, 7.06	10	1.96	0.98, 3.44	5	0.49	0.18, 1.05
2007	1031653	43	4.17	3.04, 5.54	32	6.19	4.28, 8.59	11	2.14	1.11, 3.66	3	0.29	0.07, 0.75
2008	1035089	40	3.86	2.79, 5.19	28	5.40	3.64, 7.65	12	2.32	1.24, 3.90	5	0.48	0.17, 1.04
2009	1038462	48	4.62	3.43, 6.06	31	5.96	4.10, 8.31	17	3.28	1.96, 5.10	3	0.29	0.07, 0.75
2010	1042706	58	5.56	4.25, 7.12	37	7.08	5.04, 9.62	21	4.04	2.55, 6.02	5	0.48	0.17, 1.03
2011	1046465	67	6.40	4.99, 8.06	50	9.54	7.13, 12.44	17	3.25	1.94, 5.05	6	0.57	0.23, 1.16
2012	1050743	72	6.85	5.39, 8.56	54	10.26	7.76, 13.25	18	3.43	2.08, 5.27	10	0.95	0.48, 1.67
2013	1053952	85	8.06	6.47, 9.90	65	12.32	9.57, 15.57	20	3.80	2.37, 5.71	10	0.95	0.48, 1.66
2014	1057454	95	8.98	7.30, 10.91	64	12.10	9.37, 15.31	31	5.87	4.04, 8.18	7	0.66	0.28, 1.28
2015	1061141	93	8.76	7.10, 10.67	64	12.06	9.34, 15.26	29	5.47	3.71, 7.71	4	0.38	0.12, 0.88