Table 1 Descriptive characteristics of study variables (n = 367)
Variables | Variables Subset | Number | Percentage | Mean And SD |
|---|---|---|---|---|
Gender | Girl | 164 | 44.7 | |
Boy | 199 | 54.2 | ||
No Response | 4 | 1.1 | ||
History | Singleton | 247 | 67.3 | |
twin | 104 | 28.3 | ||
Triplet | 4 | 1.1 | ||
No Response | 12 | 3.3 | ||
The Number of Maternal Abortions | 0 | 237 | 64.6 | |
1 | 62 | 16.9 | ||
2 | 15 | 4.1 | ||
More than 2 | 53 | 14.4 | ||
Type of Pregnancy | Normal | 259 | 70.6 | |
Infertility treatment | 34 | 9.3 | ||
Medication Treatment | 3 | 0.8 | ||
No Response | 71 | 19.3 | ||
Type of Parturition | Natural | 84 | 22.9 | |
Cesarean Section | 268 | 73 | ||
No Response | 15 | 4.1 | ||
The Number of Mothers’ Pregnancies | Children1-2 | 222 | 60.5 | |
Children3-4 | 93 | 25.3 | ||
More than 4 children | 16 | 4.4 | ||
No Response | 36 | 9.8 | ||
Length of Pregnancy of Mothers by Week | 25–30 | 44 | 12 | |
30–35 | 242 | 65.9 | ||
35–40 | 77 | 21 | ||
No Response | 4 | 1.1 | ||
The Condition of The Newborn | Yes | 264 | 71.9 | |
No | 103 | 28.1 | ||
Oxygen | Yes | 269 | 73.3 | |
No | 11 | 3 | ||
No Response | 87 | 23.7 | ||
Days of Receiving Oxygen | Less than 10 days | 263 | 71.7 | |
Between 10–30 days | 6 | 1.6 | ||
No Response | 98 | 26.7 | ||
Type of Treatment | IVB1 | 2 | 0.5 | |
F/U2 | 302 | 82.3 | ||
No Response | 63 | 17.2 | ||
Mother’s Age | 29.19 ± 6.68 | |||
Infant’s Age by Weeks | 3.45 ± 37.71 | |||
Baby’s Birth Weight in Grams | 1894.21 ± 565.64 | |||
Number of Hospitalization Days | 9.44 ± 7.57 | |||
The Extent of the Disease | 0 | 63 | 17.2 | |
Zone1 | 9 | 2.4 | ||
Zone2 | 81 | 22.1 | ||
Zone3 | 214 | 58.3 | ||
Degree of Retinopathy | 0 | 286 | 77.9 | |
1 | 49 | 13.4 | ||
2 | 32 | 8.7 |