Table 1

Characteristics of appointments (n=51 580)

Age groups	n	%
<1 year	12 483	24.2
1–5 years	19 857	38.5
6–12 years	12 779	24.8
13 years and over	6461	12.5
Female	24 978	48.4
Race
Black	43 064	83.5
White	6080	11.8
Other	1835	3.6
Asian	601	1.2
Ethnicity
Non-Hispanic or Latino	48 327	93.7
Hispanic or Latino	1839	3.6
Not specified or declined	1414	2.7
Median ZIP code income*
Less than $26 625	11 816	22.9
$32 118–$42 604	31 864	61.8
$45 738–$51 994	7900	15.3
Appointment season
Summer	12 841	24.9
Fall	13 215	25.6
Winter	12 578	24.4
Spring	12 946	25.1
Appointment type
Well-child	42 347	17.9
Not well-child	9233	82.1
Car travel time in minutes*
Less than 16	12 948	25.1
16–22	30 005	58.2
More than 22	8627	16.7
Bus travel time in minutes*
Less than 33	21 857	42.4
33–56	19 914	38.6
More than 56	9809	19.0
Cumulative walking distance for bus travel in miles*
Less than 0.3	14 625	28.4
0.3–0.6	28 474	55.2
More than 0.6	8481	16.4
Bus travel includes a transfer	16 493	32.0