Table 1. Demographic characteristics of the infants and their mothers in the intervention and control groups .
| Characteristics |
Intervention group
(n = 30) |
Control group
(n = 30) |
Statistical Indicators | ||
| t | df | p | |||
| Sex * | |||||
| Female | 11 (36.70) | 16 (53.30) | X2=1.68 | 1 | 0.19 |
| Male | 19 (63.30) | 14 (46.70) | |||
| Birth order* | |||||
| 1st | 17 (56.66) | 15 (50.00) | X2=0.27 | 1 | 0.60 |
| 2nd | 13 (43.33) | 15 (50.00) | |||
| Gestational age (weeks)† | 29.66 (1.64) | 29.23 (1.61) | t=-1.03 | 58 | 0.30 |
| Birth weight (g)† | 1545.67 (1382.91) | 1365.67 (173.71) | t=-0.70 | 58 | 0.48 |
| Age at the beginning of the study (days)† | 22.93 (8.19) | 22.80 (6.84) | t=-0.07 | 58 | 0.94 |
| Type of delivery * | |||||
| Normal vaginal delivery | 25 (83.30) | 28 (93.30) | X2=1.45 | 1 | 0.23 |
| Cesarean section | 5 (16.70) | 2 (6.70) | |||
| Mother's age (years)† | 28.56 (5.56) | 28.93 (5.29) | t=0.27 | 58 | 0.78 |
| Duration of discontinued or decreased lactation † | 12.56 (5.56) | 11.67 (4.93) | t=-0.66 | 58 | 0.51 |
| Mother's occupation * | |||||
| Employed | 5 (16.70) | 2 (6.70) | X2=3.17 | 2 | 0.20 |
| Housewife | 25 (83.30) | 28 (93.30) | |||
| Mother's education * | |||||
| Illiterate | 3 (10.00) | 1 (3.33) | X2=1.75 | 3 | 0.62 |
| < High school diploma | 11 (36.70) | 10 (33.33) | |||
| ≥ High school diploma | 16 (53.30) | 19 (63.33) | |||
* N (%),† Mean (SD)