Table 4.
The variables of questionnaire
| Variable | Subjecta | Contents |
|---|---|---|
| Basic information | ||
| General characteristics | M, F | Address, age, height, weight, marital status, number of children and nutritional supplements |
| Health behavior | M, F | Smoking, alcohol consumption, exercise, sleep pattern, stress, and coffee consumption and dietary habits |
| Socioeconomic status | M, F | Family income and educational level |
| Medical history | M, F | Past medical history, family medical history and drug history |
| Delivery history | M | Past pregnancy outcome (preterm, low birth weight, spontaneous abortion, induced abortion and congenital malformation) |
| Environmental information | ||
| Environmental factors | M, F | Physical agents (EMF, cell phone) and amalgam |
| Outdoor | M, F, N | Incinerating facility, landfill, sewerage, factory, industries (including the chemical industry), recognition of air pollution and noise, distance between the participant’s house and the industrial complex and distance from the participant’s house to roadways |
| Indoor | M, F, N | Duration of residence, age of building, presence of a humidifier, air conditioner, ventilation, pet, furniture, carpet, aromatic, and insecticides |
| Delivery information | ||
| Medical record | M | Maternal height and weight (pre pregnancy and at delivery), blood pressure and pregnancy-related disease |
| Information during delivery | M | Delivery date, body weight just before delivery, gestational age, delivery mode, cervical length, placenta weight at delivery and blood pressure |
| Complications | M | Premature rupture of membranes, dystocia, cephalo-pelvic disproportion, breech presentation or other abnormal position, placenta previa, placenta abruption, meconium aspiration syndrome, obstetrical hemorrhage, fetal asphyxia, precipitating labor, preterm birth, cord prolapse or eclampsia during labor, fever and anesthetic complications |
| Neonates | N | Gender, length/height, weight, and Apgar score at 1 and 5 min |
| Neonates and children information | ||
| Exposures | N, C | Breastfeeding, health status, medical history (family, past), nutrition, SES and utilization of hospital |
| Outcomes | N, C | Height and weight, head circumference, blood pressure, Bayley, IgE and eosinophil count |
aM mother, F father, N neonates, C children