Trends in the incidence of hip fracture in Gran Canaria, Canary Islands, Spain: 2007–2011 versus 1989–1993

In 1989–1993, we collected 1175 hip fractures (72 % women; mean age 78.2 ± 9.9 years), and the total incidence rate was 152.1 cases/100,000 population/year. In 2007–2011, we collected 2222 hip fracture cases (71 % women; mean age 79 ± 9.8 years). The total incidence was 180.9/100,000/year. A Poisson model showed that the incidence of fractures increased by 7.1 % (95 % CI = 3.1 %; 11.8 %) each year in 1989–1993, while there was no statistically significant variation (p = 0.515) during the period 2007–2011. The incidence in 2007–2011 was 24 % higher than in 1989 (first year in the first period) but did not differ between 2007–2011 and 1993 (the last year of the first period). Incidence rates were 76.7 % (95 % CI = 63.9 %; 90.5 %) higher in women than in men, but the female/male ratio remained unchanged. The age-adjusted incidence of hip fractures increased by 7.3 % each year from 1989 to 1993. The proportions of trochanter and cervical fractures were similar in the two time periods, but the mean hospital stay was reduced from 11 days in 1989–1993 to 7 days in 2007–2011.