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Table 3 Descriptive statistics and results of variance ratio (Fmax) test for the ethnicity status under various neighborhoods, Khanh Hoa Province, Vietnam, 2002. (n = 32,542)

From: Neighborhood size and local geographic variation of health and social determinants

r Population size Incidence Rate/10000 Population Upper Fmax Test Lower Fmax Test
  Min Max Mean Min Max Mean Variance Fmax1 DF1 * CV1 ** Fmax2 DF2 * CV2 **
100 1 1859 195 .00 100.00 7.283 243.304 4.026 20 1.571 1.000 1 3.842
200 1 5681 611 .00 100.00 7.344 183.209 3.032 19 1.587 1.328 2 2.996
300 1 8362 1143 .00 100.00 7.383 153.024 2.532 18 1.604 1.590 3 2.605
400 2 11276 1785 .00 100.00 7.402 133.603 2.211 17 1.623 1.821 4 2.372
500 2 15425 2504 .00 100.00 7.467 121.327 2.008 16 1.644 2.005 5 2.214
600 2 20047 3282 .00 88.57 7.534 112.520 1.862 15 1.667 2.162 6 2.099
700 2 23875 4146 .00 88.57 7.609 105.353 1.744 14 1.692 2.309 7 2.010
800 2 28601 5075 .00 82.50 7.682 99.320 1.644 13 1.720 2.450 8 1.939
900 2 33159 6055 .00 75.00 7.719 93.729 1.551 12 1.752 2.596 9 1.880
1000 4 36182 7081 .00 69.49 7.745 88.828 1.470 11 1.789 2.739 10 1.831
1100 9 39576 8129 .00 63.73 7.761 84.867 1.404 10 1.831 2.867 11 1.789
1200 25 43628 9194 .00 62.40 7.776 81.459 1.348 9 1.880 2.987 12 1.752
1300 25 47769 10297 .00 62.40 7.793 78.140 1.293 8 1.939 3.114 13 1.720
1400 25 49747 11427 .00 61.91 7.801 74.610 1.235 7 2.010 3.261 14 1.692
1500 25 51108 12580 .00 60.84 7.820 71.456 1.183 6 2.099 3.405 15 1.667
1600 66 52454 13750 .00 58.06 7.851 69.027 1.142 5 2.214 3.525 16 1.644
1700 128 53725 14925 .00 50.55 7.873 66.823 1.106 4 2.372 3.641 17 1.623
1800 138 55422 16133 .00 46.79 7.891 64.531 1.068 3 2.605 3.770 18 1.604
1900 138 57913 17398 .00 44.54 7.907 62.339 1.032 2 2.996 3.903 19 1.587
2000 148 59428 18708 .00 39.71 7.915 60.426 1.000 1 3.842 4.026 20 1.571
  1. r = size of neighborhood in meter radius
  2. * DF = degrees of freedom
  3. **CV1 and CV2 = critical values at 95% confidence level for Upper Fmax and Lower Fmax respectively Bold figures in Fmax1 and Fmax2 are the upper and lower limit of optimal neighborhoods, and the bold figure in "r" column is the choice of optimal neighborhood size.