Table 6

Crossing subscale characteristics: all studies combined (n = 319 crossing reliability pairs)
Subscale # items (range) Sample items* and overall subscale description Mean (SD) ICC, % Agreement Range of item ICC or Kappa
Positive Subscales
Crosswalk Amenities/Qualities 9 (0–4) Crosswalk characteristics (e.g., marked crosswalk, high visibility markings) .987 (1.08) .807, 70.2% -.012 (curb extensions) - .816
Curb Quality/Presence 2 (0–2) Pre- and post-crossing curb lining up with crossing 1.33 (.91) .684, 82.4% .648-.651
Intersection Control and Signage 10 (0–7) Stop signs, pedestrian walk signals 1.28 (1.31) .752, 71.6% .327 (traffic circle) - .811
Overall Positive Crossing Characteristics Subscale 3 subscales (0–12) Sum of subscales: crosswalk amenities/qualities, curb quality/presence, intersection control and signage 3.61 (2.53) .828, 54.2% See above
Negative Subscales
Lanes/Road Width of Crossing 1 (0–2) Distance of crossing leg (# lanes wide, trichotomized) .764 (.581) .525, 72.9% n/a
Crossing Impediments 7 (0–4) No curb ramp, gutters in crossing, faded/worn crosswalk markings 1.14 (1.17) .728, 72.9% .188 (poor visibility at corners) - .893
Overall Negative Crossing Characteristics Subscale 2 subscales (0–5) Sum of subscales: Lanes/Road Width of Crossing, Crossing Impediments 1.53 (1.48) .587, 61.2% See above
Overall Subscale
Overall Crossings Score 2 subscales (−4-8) Sum of subscales: Overall Positive Crossing Characteristics-Overall Negative Crossing Characteristics 2.05 (2.27) .830, 42.9% See above

*All item reliabilities can be found at: http://sallis.ucsd.edu webcite.

Millstein et al.

Millstein et al. BMC Public Health 2013 13:403   doi:10.1186/1471-2458-13-403

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