Table 1.
Demographic characteristics of infant bronchiolitis and otitis media cases diagnosed in Massachusetts, 2001–2009 included in analysis.
| Bronchiolitis n (%)a |
Otitis Media n (%)a |
|
|---|---|---|
| Total Cases | 20 017 | 42 336 |
| Infant Sex | ||
| Male | 11 985 (59.9) | 23591 (55.7) |
| Female | 8032 (40.1) | 18 745 (44.3) |
| Maternal Age | ||
| <20 years | 2057 (10.3) | 4997 (11.8) |
| 21–24 years | 4356 (21.8) | 9913 (23.4) |
| 25–29 years | 4796 (23.9) | 10 316 (24.4) |
| 30–34 years | 5204 (26.0) | 10 395 (24.5) |
| 35+ years | 3604 (18.0) | 6715 (15.9) |
| Parity | ||
| 0 | 6923 (34.6) | 19 021 (44.9) |
| 1 | 7362 (36.8) | 13 902 (32.8) |
| 2 or more | 5679 (28.3) | 9345 (22.1) |
| missing | 53 (0.2) | 68 (0.2) |
| Adequacy of Prenatal Care | ||
| Adequate | 15 163 (75.8) | 32 406 (76.5) |
| Intermediate | 3936 (19.7) | 8261 (19.5) |
| Inadequate | 617 (3.1) | 1263 (2.9) |
| Unknown | 251 (1.2) | 299 (0.7) |
| None | 50 (0.2) | 107 (0.2) |
| Smoking During Pregnancy | ||
| Yes | 2445 (12.2) | 5106(12.1) |
| No | 17 550 (87.7) | 37 190 (87.9) |
| missing | 22 (0.1) | 40 (0.1) |
| Drinking During Pregnancy | ||
| Yes | 311 (1.6) | 670 (1.6) |
| No | 19 684 (98.3) | 41 629 (98.3) |
| missing | 22 (0.1) | 37 (0.1) |
| Season of Conception | ||
| Winter | 3307 (16.5) | 10 440 (24.7) |
| Spring | 4372 (21.8) | 11 078 (26.2) |
| Summer | 6438 (32.2) | 10 898 (25.7) |
| Fall | 5892 (29.4) | 9902 (23.4) |
| missing | 8 (0.1) | 18 (0.1) |
| Gestational Age | ||
| >37 weeks | 17 123 (85.5) | 38 067 (89.9) |
| ≥37–32 weeks | 2266 (11.3) | 3559 (8.4) |
| <32 weeks | 620 (3.1) | 692 (1.6) |
| missing | 8 (0.1) | 18 (0.1) |
| Small for Gestational Age | ||
| Yes | 2484 (12.4) | 4855 (11.5) |
| No | 17 436 (87.1) | 37 288 (88.1) |
| missing | 97 (0.5) | 193 (0.5) |
| Maternal Race/Ethnicity | ||
| Non Hispanic White | 12 012 (60.0) | 25 900 (61.2) |
| Non Hispanic Black | 2003 (10.0) | 4099 (9.7) |
| Hispanic | 4642 (23.1) | 9301 (22.0) |
| Asian/Pacific Islander | 798 (3.9) | 1729 (4.1) |
| Other | 547 (2.7) | 1282 (3.0) |
| Missing | 15 (0.1) | 25 (0.1) |
| Maternal Education | ||
| <12th grade | 3549 (17.7) | 7714 (18.2) |
| High school graduation | 6489 (32.4) | 14 892 (35.1) |
| Some college | 9945 (49.7) | 19 670 (46.4) |
| Missing | 34 (0.1) | 60 (0.1) |
| Breastfeeding | ||
| Yes | 14 488 (72.4) | 30 170 (71.3) |
| No | 5475 (27.4) | 12 084 (28.5) |
| missing | 54 (0.3) | 82 (0.2) |
| Maternal Language Preference | ||
| English | 17 095 (85.4) | 35 797 (84.5) |
| Spanish | 1832 (9.2) | 3682 (8.7) |
| Portuguese | 576 (2.9) | 1621 (3.8) |
| Other | 442 (2.2) | 1121 (2.6) |
| missing | 72 (0.4) | 115 (0.3) |
| Household Income | ||
| <$20,000 | 1502 (7.5) | 3091 (7.3) |
| $20,000–$70,000 | 11 220 (56.1) | 24 865 (58.7) |
| ≥$70,000 | 7291 (36.4) | 14 372 (34.0) |
| missing | 4 (0.02) | 8 (0.02) |
| Delivery Source of Payment | ||
| Health Maintenance Organization | 9071 (45.3) | 18 014 (42.5) |
| Medicaid/CommonHealth | 7467 (37.3) | 17 143 (40.5) |
| Other | 3428 (17.1) | 7097 (16.8) |
| missing | 51 (0.3) | 82 (0.3) |
a
Percentages may not sum to 100% due to rounding.