An interaction term was entered in both models to test for any interaction effect between systolic 5-FU chemical structure BP and gait speed. The association of BP with mortality also was analyzed in gait speed subcohorts. To reduce the number of covariates used to examine gait speed subcohorts, which were characterized by fewer events (deaths within 5 years), 26 only variables from model 2 in the total sample that were associated with mortality at a significance level

of P ≤ .05 in multivariate analysis (age, age × follow-up time, sex, congestive heart failure, atrial fibrillation, myocardial infarction, cancer, depression, angina pectoris, body mass index, and MMSE score) were included in this model. To control for the influence MI-773 research buy of early death, analyses using both models were repeated with the exclusion of data from participants who died in the first year after data collection. Statistical analyses were performed

using SPSS statistics software (version 20.0; IBM Corporation, Armonk, NY). All analyses were 2-tailed and P < .05 was considered significant. Table 1 shows the baseline characteristics of the study population with respect to survival status and gait speed subcohort. In the study population (n = 806), the mean age was 89.6 years. A total of 490 (61%) participants died within 5 years (mean, 3.34 years) after study inclusion. Approximately two-thirds (n = 561) of participants were women, most (63%) of whom had gait speeds slower than 0.5 m/s (slower-walking subcohort, also including habitually nonwalking participants). The slower-walking subcohort included 3 times as many women as men. Almost two-fifths (39%) of study participants before were living in a residential care facility, and few (16%) of these participants were assigned to the faster-walking subcohort. BP-lowering drugs were prescribed to 70% of participants. ACE inhibitor and diuretic prescriptions were significantly more prevalent in the slower-walking subcohort (20% and 54%, respectively) and among those

who died within 5 years of study inclusion (21% and 52%, respectively) than in other groups. High age, care facility residency, living alone, congestive heart failure, atrial fibrillation, cerebrovascular disease, dementia, hip fracture, depression, and angina pectoris also were significantly more prevalent among those who died within 5 years of study inclusion and those in the slower-walking subcohort. Gait speed and BP were lower among those who died within 5 years than among those who lived (gait speed [mean ± standard deviation], 0.46 ± 0.20 vs 0.58 ± 0.21 m/s, P < .001; systolic BP, 142.7 ± 23.9 vs 153.3 ± 22.4 mm Hg, P < .001; diastolic BP, 73.7 ± 11.3 vs 76.5 ± 10.4 mm Hg, P < .001). Table 2 presents mean gait speed, BP, and survival status according to age and gait speed groups. Gait speed and BP showed decreasing trends with increasing age. BP also showed decreasing trends with decreasing gait speed, while the proportion of deaths increased.