Table 2.

Prevalence ratio of MS patients in the nationwide inpatient Sample for acute hip fracture admissions from 1988 to 2011 compared with the expected MS prevalence based on previous studies

Standardized prevalence ratio		95% CI
Prevalence of MS when age-adjusted	2.844	(2.837–2.852)
Prevalence of MS when sex-adjusted and age-adjusted	2.505	(2.499 –2.512)
Prevalence of MS when sex-adjusted and race-adjusted*	2.175	(2.168–2.182)

Notes: Prevalence ratios are adjusted for age, age and sex, and race and sex.

^*35% of the sample did not provide information on race and ethnicity.

Abbreviation: MS, multiple sclerosis; CI, confidence interval.