Table 1b.
Characteristics of Patients Whose Charts Were Reviewed for the Study
| Characteristic (Unique patients = 6,007) | Mean (Standard Deviation) at Each Participating Practice | |||
|---|---|---|---|---|
| Reporting Period | ||||
| Pre-EHR | Post-EHR | |||
| p1 | p2 | e1 | e2 | |
| Number of months in period | 12.0 (0.0) | 12.0 (0.0) | 11.0 (4.3) | 6.0 (0.0) |
| Total number of patient charts reviewed | 1,405 | 2,342 | 3,225 | 2,514 |
| Number of charts reviewed per practice | 54.0 (36.4) | 66.9 (39.4) | 94.9 (17.1) | 73.9 (14.4) |
| Patient age (in years)a | 51.5 (4.3) | 51.8 (4.5) | 47.3 (5.3) | 49.0 (5.8) |
| Number of visits in the reporting periodb | 3.8 (1.7) | 3.9 (1.5) | 3.4 (1.4) | 2.7 (1.1) |
| Percent female | 55.0 (21.1) | 56.1 (16.2) | 60.5 (10.8) | 60.7 (11.3) |
| Number of patients per practice with the following diagnosis: | ||||
| Diabetes | 14.1 (12.2) | 17.1 (13.1) | 14.7 (8.0) | 12.9 (7.7) |
| Hyperlipidemia | 22.7 (19.4) | 26.9 (23.0) | 29.9 (17.3) | 26.4 (15.8) |
| Hypertension | 34.1 (25.8 | 40.3 (29.2) | 37.1 (16.4) | 32.1 (13.8) |
| Ischemic vascular disease | 2.7 (2.8) | 3.8 (5.2) | 4.9 (7.2) | 4.7 (6.2) |
| Current smokerc | 13.7 (12.6) | 16.4 (15.4) | 9.4 (5.9) | 7.6 (4.7) |
| Two or more conditions | 27.2 (20.8) | 32.3 (25.6) | 28.2 (15.0) | 25.0 (14.0) |
Notes:
a
Analysis of Variance (ANOVA) p-value =0.0009. Duncan multiple range tests indicate that, of the charts sampled at each practice, mean age was significantly higher in patients with office visits in p1 and p2 than those with visits in e1 and e2.
b
ANOVA p-value = 0.0038. Duncan multiple range tests indicate that, of the charts sampled, the mean number of office visits per patient per practice was significantly lower in period e2 than in all other periods.
c
ANOVA p-value = 0.0028. Duncan multiple range tests indicate that, of the charts sampled, the mean number of current smokers per practice was significantly greater in period p2 than in periods e1 and e2.