Maternal and infant demographic information
| Group* | |||
|---|---|---|---|
| Colic (n = 19) | Comparison (n = 24) | p value | |
| *There were no significant differences between the two groups for these variables. | |||
| †Socioeconomic status was measured by the Hollingshead four factor index. | |||
| ‡Maternal depression was measured by the Beck Depression Inventory. | |||
| Mean (SD) | |||
| Mother’s age (y) | 30.1 (5.4) | 29.3 (4.8) | 0.47 |
| Mother’s education (y) | 14.7 (2.1) | 14.8 (2.1) | 0.85 |
| Infant age at entry (wk) | 5.8 (1.7) | 5.5 (1.3) | 0.53 |
| Birth weight (kg) | 3.3 (.41) | 3.5 (.47) | 0.36 |
| Socioeconomic status† | 45.6 (8.9) | 45.5 (14.3) | 0.96 |
| Social support | 26.5 (9.9) | 29.9 (9.3) | 0.25 |
| Maternal depression‡ | 7.7 (4.8) | 6.8 (4.1) | 0.54 |
| n (%) | |||
| Infant nutrition | |||
| Formula | 8 (42) | 8 (33) | |
| Breast milk | 2 (11) | 3 (13) | |
| Breast milk and formula | 9 (47) | 13 (54) | 0.84 |
| Marital status | |||
| Married | 18 (95) | 23 (96) | 0.71 |
| Female/male | 9 (47)/10 (53) | 9 (38)/15 (62) | 0.52 |
| Ethnicity | |||
| Caucasian | 17 (90) | 22 (92) | 0.49 |
| African-American | 1 (5) | 0 (0) | |
| Hispanic | 1 (5) | 2 (8) | |