Table 2.

Sample characteristics by economic status

	All children (%)	Poverty (%)	Near poverty (%)	Middle income (%)	High income (%)
Geographic environment
Large city	29.2	22.8	23.7	26.3	41.0
Small city/town	29.7	24.7	28.0	30.4	30.3
Rural area	41.1	52.5	48.3	43.4	28.8
Physical conditions at birth
Gender
Boy	52.6	53.4	52.7	52.6	52.4
Girl	47.4	46.6	47.3	47.4	47.6
Use of NHI healthcare with low birth weight as a diagnosis
Yes	2.0	4.0	2.0	1.9	2.1
No	98.0	96.0	98.0	98.1	97.9
Number of outpatient visits during the first week of life
0	94.9	93.3	94.9	94.7	95.5
1	4.5	6.1	4.4	4.7	4.0
2 or more	0.6	0.6	0.6	0.7	0.5
Additional physical conditions related to potentially preventable hospitalisations before age two
Number of outpatient visits for any of the five disease categories during the first two years of life
0	1.1	2.1	2.0	0.8	1.0
1-10	9.0	13.2	10.7	7.1	10.8
11-20	18.1	18.4	18.5	16.8	20.5
21-30	20.6	20.1	19.9	20.5	21.5
31 or more	51.2	46.3	48.9	54.8	46.2
Access to preventive care
Number of public well-child care visits used during the first two years of life
0	5.6	15.1	7.3	4.9	4.8
1-2	14.2	25.9	16.8	13.5	12.4
3-4	28.3	28.1	29.1	28.2	27.9
5-6	51.9	30.9	46.8	53.4	54.9