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. Author manuscript; available in PMC: 2016 Nov 1.
Published in final edited form as: Med Care. 2015 Nov;53(11):931–939. doi: 10.1097/MLR.0000000000000426

Table 2.

Descriptive Statistics for County Level Variables in 2006 by Race and Sample Size

>= 1,000 population per
White and Black
>= 3,000 population per
White and Black
>= 5,000 population per
White and Black
>= 10,000 population per
White and Black
N = 172 N = 115 N = 95 N = 65
Prevention Quality Indicator Composite Rates per 1000 people
White Black White Black White Black White Black
Mean (SD) Mean (SD) Diff: W-B Mean (SD) Mean (SD) Diff: W-B Mean (SD) Mean (SD) Diff: W-B Mean (SD) Mean (SD) Diff: W-B
Overall (PQI90) 14.80 (5.12) 15.53 (6.39) −0.73 14.96 (4.97) 16.94 (5.73) −1.98** 14.76 (4.49) 16.97 (5.03) −2.21** 14.40 (4.85) 17.00(4.85) −2.60**
Chronic (PQI92) 6.95 (2.74) 10.38(4.42) −3.42*** 7.14 (2.66) 11.47 (3.88) −4.33*** 7.10 (2.48) 11.53 (3.46) −4.43*** 6.99 (2.30) 11.68 (3.40) −4.69***
Acute (PQI91) 7.84 (2.60) 5.15 (2.20) 2.69*** 7.82 (2.49) 5.47 (2.06) 2.35*** 7.66 (2.17) 5.44(1.81) 2.22*** 7.42 (2.00) 5.33 (1.57) 2.09***
Population Characteristics measured as the percent of population over 18 years in the county
White Black White Black White Black White Black
Mean (SD) Mean (SD) Diff: W-B Mean (SD) Mean (SD) Diff: W-B Mean (SD) Mean (SD) Diff: W-B Mean (SD) Mean (SD) Diff: W-B
Male 49.38 (2.46) 55.76 (11.98) −6.38*** 48.91 (1.98) 51.37 (7.77) −2.46** 48.53 (1.49) 50.00 (5.69) −1.47* 48.36 (1.10) 48.08 (2.99) 0.27
Female 50.62 (2.46) 44.24 (11.98) 6.38*** 51.09 (1.98) 48.63 (7.77) 2.46** 51.47 (1.49) 50.00 (5.69) 1.47* 51.64 (1.10) 51.92 (2.99) −0.27
18–39 38.35 (6.69) 38.79 (6.76) −0.44 38.53 (7.06) 38.71 (7.07) −0.17 38.21 (7.12) 38.30 (7.08) −0.09 39.35 (6.22) 39.34 (6.21) 0.01
40–64 43.07 (3.33) 43.00 (3.38) 0.07 42.65 (3.19) 42.61 (3.23) 0.04 42.62 (2.87) 42.60 (2.89) 0.02 42.53 (2.62) 42.52 (2.62) 0.01
65–74 9.85 (3.20) 9.74 (3.20) 0.11 9.89 (3.45) 9.84 (3.43) 0.05 9.98 (3.68) 9.95 (3.65) 0.03 9.37 (2.77) 9.37 (2.77) 0.00
75 plus 8.73 (2.90) 8.47 (2.97) 0.26 8.93 (3.15) 8.84 (3.17) 0.09 9.18 (3.34) 9.14 (3.35) 0.05 8.75 (2.89) 8.76 (2.89) −0.01
Total Population 191,987 (268,641) 35,941 (87,148) 156,046*** 257,780 (306,508) 52,854 (102,573) 204,926*** 299,199 (320,756) 63,179 (110,183) 236,020*** 388,002 (352,016) 88,979 (125,256) 299,023***
Marker Condition Rates per 1000 people
White Black White Black White Black White Black
Mean (SD) Mean (SD) Diff: W-B Mean (SD) Mean (SD) Diff: W-B Mean (SD) Mean (SD) Diff: W-B Mean (SD) Mean (SD) Diff: W-B
Acute myocardial infarction with length of stay >5 days or disposition of death 0.87 (0.42) 0.50 (0.31) 0.38*** 0.94 (0.43) 0.57 (0.29) 0.38*** 0.97 (0.43) 0.59 (0.28) 0.38*** 1.00 (0.44) 0.57 (0.23) 0.43***
Appendicitis with appendectomy 0.94 (0.25) 0.50 (0.22) 0.44*** 0.95 (0.25) 0.50 (0.15) 0.45*** 0.96 (0.24) 0.50 (0.15) 0.46*** 0.98 (0.22) 0.51 (0.12) 0.46***
Gastro-intestinal obstruction 1.44 (0.41) 1.10 (0.40) 0.34*** 1.47 (0.40) 1.13 (0.35) 0.34*** 1.47 (0.37) 1.14 (0.31) 0.33*** 1.44 (0.36) 1.13 (0.29) 0.31***
Hip/femur fracture (ages 45 plus) 3.23 (1.05) 0.60 (0.34) 2.63*** 3.40 (1.06) 0.66 (0.30) 2.73*** 3.45 (0.99) 0.67 (0.27) 2.78*** 3.54 (0.99) 0.67 (0.26) 2.88***
*

p<.05;

**

p<.01;

***

p<.001