# Table 1 Age and sex-specific incidence rates for primary THA per 100,000 inhabitants in Spain (2001-8).

2001 2002 2003 2004 2005 2006 2007 2008
Age Sex N = 18,185 N = 19,029 N = 19,545 N = 19,733 N = 20,461 N = 21,176 N = 21,354 N = 22,308 P*
40-54 Men 29.64 31.90 30.83 31.61 33.97 36.62 37.97 39.14 <0.001
Women 17.54 16.92 16.16 16.80 17.93 17.92 17.30 18.20 0.104
50-64 Men 89.80 99.37 97.41 96.92 103.27 104.48 104.53 110.86 <0.001
Women 74.57 78.92 74.77 75.74 69.90 74.03 75.36 75.29 0.420
65-74 Men 200.39 187.94 197.35 189.43 195.56 190.92 192.18 184.98 0.022
Women 217.76 216.53 220.47 206.90 205.14 206.89 199.46 200.96 <0.001
75-84 Men 164.55 192.34 201.86 201.05 209.11 221.16 208.99 226.10 <0.001
Women 214.47 241.82 242.24 256.66 262.51 265.94 262.04 275.89 <0.001
≥ 85 Men 79.25 73.04 81.41 69.09 65.92 78.75 90.63 101.59 <0.001
Women 100.59 102.27 106.43 109.22 112.70 109.87 120.03 119.35 0.008
Total Men 94.64 97.99 99.69 97.52 101.55 103.44 102.87 105.71 <0.001
Women 102.80 106.18 105.48 104.78 104.00 104.83 102.88 105.01 0.931
Both 99.05 102.40 102.80 101.42 102.87 104.19 102.88 105.33 <0.001
1. Incidence rates calculated by dividing the number of cases per year sex and age group with the corresponding number of person in that population group according to the National Institute of Statistics (INE) reported at December 31 each year [17].
2. *P value for time trend estimated using Poisson regression models