TABLE 1—
Weighted Percentages for the Maternal and Provider Characteristics Used in the Analyses for the Full Sample, by Up-to-Date (UTD) Immunization Status: US National Immunization Survey, 2003
| UTD Status, Weighted % (SD) | ||||
| Sample | Not UTD | UTD | Pa | |
| Mother’s age, y | .001 | |||
| ≤ 29 | 45.7 (0.8) | 50.7 (1.6) | 44.4 (0.9) | |
| ≥ 30 | 54.3 (0.8) | 49.3 (1.6) | 55.6 (0.9) | |
| Mother’s educational level | .001 | |||
| Less than high school | 18.1 (0.7) | 19.5 (1.5) | 17.7 (0.8) | |
| High school | 29.8 (0.7) | 32.7 (1.6) | 29.1 (0.8) | |
| Some college | 23.2 (0.7) | 24.1 (1.4) | 23.0 (0.7) | |
| College | 28.9 (0.6) | 23.7 (1.2) | 30.3 (0.7) | |
| Child’s race/ethnicityb | .001 | |||
| Non-Hispanic other/multiracial | 8.6 (0.4) | 8.3 (0.8) | 8.6 (0.5) | |
| Non-Hispanic Black | 11.4 (0.5) | 16.1 (1.4) | 10.2 (0.5) | |
| Hispanic | 23.9 (0.6) | 22.7 (1.4) | 24.2 (0.7) | |
| Non-Hispanic White | 56.1 (0.7) | 52.9 (1.6) | 57.0 (0.8) | |
| No. of children aged younger than 18 years | .001 | |||
| ≥ 4 | 13.3 (0.6) | 19.1 (1.4) | 11.8 (0.6) | |
| 2–3 | 61.2 (0.8) | 61.5 (1.6) | 61.1 (0.8) | |
| 1 | 25.5 (0.6) | 19.4 (1.3) | 27.1 (0.7) | |
| Mother’s marital status | .001 | |||
| Divorced/separated/widowed/deceased | 7.9 (0.4) | 9.9 (1.0) | 7.4 (0.5) | |
| Never married | 18.7 (0.6) | 23.9 (1.5) | 17.3 (0.7) | |
| Married | 73.4 (0.7) | 66.2 (1.6) | 75.3 (0.8) | |
| Income-to-poverty ratio | .001 | |||
| < 1 | 25.6 (0.7) | 29.4 (1.6) | 24.6 (0.8) | |
| 1–1.99 | 25.0 (0.7) | 27.9 (1.5) | 24.2 (0.8) | |
| 2–2.99 | 15.5 (0.5) | 16.0 (1.2) | 15.4 (0.6) | |
| ≥ 3 | 33.9 (0.7) | 26.7 (1.4) | 35.8 (0.8) | |
| Information reported from vaccination card | .001 | |||
| No | 36.6 (0.7) | 43.9 (1.7) | 34.7 (0.8) | |
| Yes | 63.4 (0.7) | 56.1 (1.7) | 65.3 (0.8) | |
| Provider offers comprehensive care | .004 | |||
| All providers | 84.7 (0.5) | 80.6 (1.4) | 85.7 (0.6) | |
| Some but not all providers | 7.5 (0.4) | 9.1 (0.9) | 7.1 (0.4) | |
| No provider/provider unknown | 7.8 (0.4) | 10.3 (1.1) | 7.1 (0.4) | |
| Provider offers acute illness care | .058 | |||
| All providers | 74.8 (0.6) | 71.7 (1.5) | 75.6 (0.7) | |
| Some but not all providers | 9.4 (0.4) | 10.8 (1.0) | 9.0 (0.5) | |
| No provider/provider unknown | 15.9 (0.5) | 17.5 (1.3) | 15.4 (0.6) | |
| Provider offers follow-up visits | .038 | |||
| All providers | 77.1 (0.6) | 73.9 (1.5) | 78.0 (0.7) | |
| Some but not all providers | 9.4 (0.4) | 10.6 (1.0) | 9.0 (0.5) | |
| No provider/provider unknown | 13.5 (0.5) | 15.5 (1.3) | 13.0 (0.6) | |
| Provider offers after-hours telephone services | .003 | |||
| All providers | 62.7 (0.7) | 58.5 (1.6) | 63.9 (0.8) | |
| Some but not all providers | 10.5 (0.5) | 13.2 (1.1) | 9.8 (0.5) | |
| No provider/provider unknown | 26.8 (0.7) | 28.3 (1.5) | 26.4 (0.8) | |
| Provider offers WIC program or services | .048 | |||
| All providers | 25.4 (0.7) | 25.2 (1.5) | 25.5 (0.7) | |
| Some but not all providers | 8.9 (0.5) | 11.3 (1.1) | 8.3 (0.5) | |
| No provider/provider unknown | 65.7 (0.7) | 63.6 (1.6) | 66.3 (0.8) | |
| Provider offers other services | .038 | |||
| All providers | 7.8 (0.4) | 9.7 (1.0) | 7.3 (0.4) | |
| Some but not all providers | 6.4 (0.4) | 7.1 (0.9) | 6.2 (0.4) | |
| No provider/provider unknown | 85.8 (0.5) | 83.2 (1.3) | 86.5 (0.6) | |
| Provider reports vaccines to immunization registry | .175 | |||
| All providers | 33.7 (0.7) | 31.4 (1.5) | 34.3 (0.8) | |
| Some but not all providers | 8.8 (0.4) | 9.5 (0.9) | 8.6 (0.5) | |
| No provider | 38.4 (0.7) | 37.9 (1.6) | 38.5 (1.6) | |
| Unknown | 19.2 (0.6) | 21.2 (1.4) | 18.6 (0.7) | |
| Provider participates in Vaccines for Children program | .067 | |||
| All providers | 77.4 (0.6) | 76.0 (1.4) | 77.8 (0.7) | |
| Some but not all providers | 6.3 (0.3) | 7.9 (0.9) | 5.8 (0.4) | |
| No provider | 8.3 (0.4) | 7.3 (0.8) | 8.5 (0.5) | |
| Unknown | 8.0 (0.4) | 8.9 (1.0) | 7.8 (0.4) | |
| Provider facility type | .184 | |||
| All public | 14.3 (0.5) | 14.9 (1.1) | 14.2 (0.6) | |
| All hospital | 7.8 (0.4) | 7.7 (0.9) | 7.9 (0.5) | |
| All private | 61.8 (0.7) | 58.7 (1.6) | 62.7 (0.8) | |
| All military/other | 1.5 (0.2) | 1.2 (0.3) | 1.6 (0.2) | |
| All WIC | 0.3 (0.1) | 0.3 (0.2) | 0.2 (0.1) | |
| Mixed (1 or more of these subcategories) | 9.7 (0.5) | 11.3 (1.1) | 9.2 (0.5) | |
| Unknown | 4.6 (0.3) | 5.9 (0.8) | 4.3 (0.3) | |
| Unweighted sample, no.c | 11 860 | 2 350 | 9 510 | |
| Weighted sample, no. | 2 968 008 | 619 771 | 2 348 237 | |
Note. WIC = Special Supplemental Nutrition Program for Women, Infants, and Children. National Immunization Survey data include information relating to UTD status on individual vaccinations as well as several vaccination series. Information about children’s providers was collected, and UTD status was verified via reviews of immunization records received directly from providers. Provider records included accurate information on vaccine administration, and age was reported in months and days. As a result of rounding, column values may not sum to 100.
aUnivariate logistic regression models were used to screen for possible predictors of UTD status. Maternal characteristics with P values below .05 were included in subsequent multivariate analyses.
bUsed as a proxy for mother’s race/ethnicity.
cReflects number of respondents included in the analysis.