Description of variables and predictors of total time (minutes) spent on PN clients using generalised least squares regression (R 2 =33.7; n=1131)
| Variable | Percentage* | Coefficient | Standard error | t Ratio† | Probability |
|---|---|---|---|---|---|
| *All percentages in column 1 use the total patient population as the denominator (which includes original or index patients as well as contacts to index patients). For example, 18.8% of the PN clients were managed by white DIS and 72.4% of the clients were managed by black DIS. | |||||
| †Statistically significant t ratios (>1.96) are in bold type. | |||||
| Note: The intercept of 64.77 minutes represents the average total time spent on a black female original patient in the South site who has a diagnosis of chlamydia and an outcome of administrative closure; because the interaction term matches black clients with black workers, the actual number of minutes spent on the referent client is 60.19 (64.77 minus 4.58) minutes. The average total time spent for clients with other characteristics can be calculated by adding the coefficients (or subtracting if a negative coefficient) for the respective characteristic. | |||||
| Intercept | 64.77 | 15.28 | 4.23 | 0.00 | |
| Client type | |||||
| Contact | 34.6 | −10.88 | 2.76 | −3.99 | 0.00 |
| Both contact and original patient | 3.6 | 74.29 | 6.4 | 11.62 | 0.00 |
| Unclassified | 5.8 | −40.31 | 5.42 | −7.44 | 0.00 |
| (Reference = original patient) | 56.0 | ||||
| STD | |||||
| Gonorrhoa | 25.5 | −6.58 | 4.17 | −1.57 | 0.11 |
| HIV | 10.1 | 16.95 | 6.33 | 2.67 | 0.00 |
| P&S syphilis | 6.5 | 5.17 | 5.79 | 0.89 | 0.37 |
| Other syphilis | 39.9 | 14.01 | 3.91 | 3.58 | 0.00 |
| (Reference = chlamydia) | 18.0 | ||||
| Outcome | |||||
| Prophylactic treatment | 7.6 | 8.64 | 7.99 | 1.08 | 0.28 |
| Infected and treated | 31.2 | 15.69 | 7.06 | 2.23 | 0.03 |
| Previously treated | 17.1 | 13.37 | 7.27 | 1.84 | 0.07 |
| Refused treatment | 3.4 | 15.67 | 8.84 | 1.77 | 0.08 |
| Unable to locate | 9.5 | 8.48 | 7.59 | 1.11 | 0.26 |
| New positive (HIV) | 1.1 | 59.08 | 13.17 | 4.49 | 0.00 |
| Previously known positive (HIV) | 2.2 | 18.83 | 10.91 | 1.72 | 0.08 |
| Negative/not infected | 6.5 | 5.67 | 7.97 | 0.71 | 0.47 |
| Other | 1.5 | 8.29 | 11.28 | 0.74 | 0.46 |
| Missing | 18.3 | 11.70 | 7.34 | 1.59 | 0.11 |
| (Reference = administrative closure) | 3.1 | ||||
| Client characteristics | |||||
| Age (years) | −0.15 | 0.13 | −1.14 | 0.26 | |
| Race/ethnicity | |||||
| White | 6.4 | −0.92 | 6.03 | −0.15 | 0.88 |
| Hispanic | 9.7 | 0.95 | 5.75 | 0.17 | 0.87 |
| Other | 12.8 | −2.47 | 5.55 | −0.45 | 0.65 |
| (Reference = black) | 71.1 | ||||
| Male (Reference = female) | 45.7 | 0.35 | 3.23 | 0.11 | 0.91 |
| DIS characteristics | |||||
| Race/ethnicity | |||||
| White | 18.8 | 12.63 | 8.84 | 1.43 | 0.15 |
| Asian | 3.8 | −8.75 | 14.27 | −0.61 | 0.54 |
| Hispanic | 2.5 | 22.41 | 19.42 | 1.16 | 0.25 |
| Other | 2.5 | 5.47 | 19.63 | 0.27 | 0.78 |
| (Reference = black) | 72.4 | ||||
| Male (Reference = female) | 47.8 | 7.77 | 6.74 | 1.52 | 0.25 |
| Years of experience | −1.08 | 0.82 | −1.31 | 0.19 | |
| DIS/client match | |||||
| Sex match (male) | 19.3 | −2.10 | 4.59 | −0.46 | 0.64 |
| Ethnicity match (black) | 58.4 | −4.58 | 5.41 | −0.85 | 0.4 |
| Miles driven per client | 0.51 | 0.13 | 3.83 | 0.00 | |
| Percentage of clients with mileage >0 | 26.2 | ||||
| Study site | |||||
| Northeast | 33.3 | −42.02 | 10.77 | −3.93 | 0.00 |
| West | 22 | −22.21 | 12.85 | −1.73 | 0.08 |
| Midwest | 31.1 | −18.10 | 11.62 | −1.56 | 0.12 |
| (Reference = south) | 13.5 | ||||