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. Author manuscript; available in PMC: 2013 Dec 9.
Published in final edited form as: Health Place. 2012 Apr 5;18(4):10.1016/j.healthplace.2012.03.012. doi: 10.1016/j.healthplace.2012.03.012

Table 1.

Characteristics of directly-observed neighborhood units; Alamance, Chatham, Durham, Orange Counties, NC (2005 Chatham, Durham, Orange Counties, NC (2006).

Four neighborhood contexts: geographic description Census tract (ct) Block group (bg) Secondary polygon (sp) Tertiary ngbd (tn)
Total number of road segments 111 317 1316 6159
Number with any roads audited 96 235 497 1369
Number with ≥20% of roads audited 62 157 396 1299
 Mean of roads (SD) 362.56 (262.89) 131.10 (76.05) 34.82 (49.64) 9.00 (20.49)
  Mean audited roads (SD) 169.73(136.12) 69.69 (49.47) 21.70 (34.13) 6.83 (14.35)
  Mean % of audited roads 51.31 (22.90) 54.71 (24.72) 67.44 (27.85) 89.51 (21.24)
  Median audited roads 129 54 10 1
 Mean length of roads (miles) (SD) 49.51 (52.40) 16.61 (14.04) 3.79 (5.57) 0.90 (1.93)
  Mean audited roads (miles) (SD) 18.86 (15.23) 7.61 (5.45) 2.11 (2.96) 0.68 (1.26)
  Mean % of audited road lengths (SD) 49.3 (23.7) 53.4 (25.3) 67.1 (28.3) 90.44 (20.14)