Table 1: Number of visits in the Centricity database (current study) and the National Ambulatory Medical Care Survey (NAMCS) database (taken from Crawford et al. (8)), by sex and age group
Sex; age, yrNo. of visits per 100 person-years
NAMCS database
n = 963 617		Centricity database
n = 6 202
Female376.8483.3
< 15245.7380.3
15–24220.0392.9
25–44313.0401.1
45–64446.9426.3
65–74671.3519.5
≥ 75784.6569.5
Male283.1403.1
< 15282.9386.0
15–24125.1279.1
25–44177.5343.8
45–64332.7396.3
65–74618.6481.0
≥ 75741.4543.2