Table 1.
Differences in sociodemographic, obstetrics, and hair cortisol levels between Group 1 (final sample) and Group 2 (participants not attending the neurodevelopment assessment appointment).
| Group 1 * (n = 41) X (SD)/N (%) |
Group 2 * (n = 34) X (SD)/N (%) |
Test ** | p-Value | ||
|---|---|---|---|---|---|
| Sociodemographic Variables | |||||
| Age (years) | 32.90 (4.15) | 33.06 (3.72) | −1.12 | 0.21 | |
| Nationality | Spanish | 35 (85.40%) | 29 (85.30%) | 0.01 | 0.99 |
| Immigrant | 6 (14.60%) | 5 (14.7%) | |||
| Marital status | Single/divorced/widow | 4 (9.80%) | 6 (17.60%) | 1.01 | 0.31 |
| Married/cohabitant | 37 (90.20%) | 28 (82.40%) | |||
| Employment situation | Working | 33 (80.50%) | 28 (82.40%) | 0.04 | 0.83 |
| Unemployed | 8 (19.50%) | 6 (17.60%) | |||
| Salary | <1000 € | 15 (36.60%) | 12 (35.30%) | 0.12 | 0.93 |
| 1000–2000 € | 6 (14.60%) | 6 (17.6%) | |||
| >2000 € | 20 (48.8%) | 16 (47.1%) | |||
| Level of education (years) | 13.90 (2.09) | 13.29 (2.55) | 1.13 | 0.26 | |
| Sport | Yes | 22 (53.7%) | 13 (38.2%) | 1.77 | 0.18 |
| No | 19 (46.30%) | 13 (61.80%) | |||
| Hair aspect | Nature | 19 (46.30%) | 14 (41.20%) | 0.75 | 0.38 |
| Dyed | 22 (53.70%) | 20 (58.80%) | |||
| Obstetric Information | |||||
| Primiparous | Yes | 19 (46.3%) | 16 (47.1%) | 0.01 | 0.95 |
| No | 22 (53.70%) | 18 (52.90%) | |||
| Wanted pregnancy | Yes | 36 (87.8%) | 28 (82.4%) | 0.44 | 0.51 |
| No | 5 (12.2%) | 6 (17.60%) | 0.74 | 0.86 | |
| Previous miscarriages | Yes | 16 (39.0%) | 18 (52.90%) | 1.45 | 0.23 |
| No | 25 (61.0%) | 16 (47.10%) | |||
| Labor and birth | Eutocic | 34 (82.90%) | 30 (88.20%) | 1.72 | 0.42 |
| Dystocic | 5 (12.20%) | 4 (11.8%) | |||
| C-section | 2 (4.90%) | 0 (0%) | |||
| Pregnancy method | Spontaneous | 36 (87.80%) | 31 (91.20%) | 0.22 | 0.63 |
| Assisted reproductive Technique | 5 (12.2%) | 3 (8.8%) | |||
| Sex of the fetus | Female | 22 (53.70%) | 19 (55.90%) | 0.04 | 0.84 |
| Male | 19 (46.3%) | 15 (44.1%) | |||
| Infant birth weight (g) | 3200 (377.05) | 3299 (379.46) | −1.12 | 0.26 | |
| Hair Cortisol Levels | |||||
| Maternal hair cortisol levels (pg/mg) | 1st trimester | 303.52 (392.35) | 394.68 (497.01) | −0.88 | 0.38 |
| 2nd trimester | 422.64 (712.78) | 373.88 (514.97) | 0.33 | 0.74 | |
| 3rd trimester | 386.46 (338.93) | 375.38 (569.65) | 0.11 | 0.92 | |
| Postpartum (1 month) | 919.27 (1536.71) | 629.28 (1088.28) | 0.92 | 0.36 | |
| Infant hair cortisol levels (pg/mg) | Postpartum (1 month) | 2747.45 (2209.54) | 2359.72 (1400.36) | 0.87 | 0.38 |
Note: * Group 1 = Participants’ infants were assessed using the Bayley Scale of Infant Development (BSID); Group 2 = Participants’ infants were not assessed with the BSID. ** T-test was used to quantitative variables and chi-square test to categorical variables.