Table 3.

Orthopedic surgery trend (THA, TKA, AA, and ULA) by sex, age ranges, and surgery type.

Variables	Annual Trend, %	IRR	95% CI	p
All OS
Men	0.74	1.007	0.998–1.017	0.137
Women	0.17	1.002	0.990–1.014	0.781
20–40 yrs	−2.69	0.973	0.959–0.987	< 0.001
40–60 yrs	−2.97	0.970	0.962–0.979	< 0.001
60–80 yrs	1.09	1.011	1.003–1.019	0.007
> 80 yrs	5.40	1.054	1.040–1.068	< 0.001
THA
Men	0.42	1.004	0.994–1.014	0.412
Women	−0.69	0.993	0.980–1.006	0.288
20–40 yrs	−2.05	0.979	0.962–0.997	0.024
40–60 yrs	−3.55	0.964	0.955–0.974	< 0.001
60–80 yrs	−0.99	0.990	0.981–0.999	0.028
> 80 yrs	4.64	1.046	1.031–1.062	< 0.001
TKA
Men	1.51	1.015	1.004–1.027	0.01
Women	0.65	1.006	0.993–1.020	0.352
20–40 yrs	−3.79	0.962	0.946–0.979	< 0.001
40–60 yrs	−2.86	0.971	0.961–0.982	< 0.001
60–80 yrs	2.56	1.026	1.018–1.034	< 0.001
> 80 yrs	6.75	1.067	1.043–1.092	< 0.001
AA
Men	−2.89	0.971	0.944–0.999	0.045
Women	−3.04	0.970	0.957–0.983	< 0.001
ULA
Men	1.78	1.018	0.989–1.047	0.223
Women	1.58	1.016	1.001–1.031	0.034
20–40 yrs	−1.57	0.984	0.954–1.015	0.315
40–60 yrs	−1.06	0.989	0.968–1.011	0.333
60–80 yrs	3.30	1.033	1.019–1.048	< 0.001
> 80 yrs	10.68	1.107	1.063–1.153	< 0.001

IRR: incidence rate ratio; OS: orthopedic surgery; THA: total hip arthroplasty; TKA: total knee arthroplasty; AA: arthrodesis; ULA: upper limb arthroplasty.