| Variables | Nurses | Absolute Frequency (N) | Percentage of Sample (%) |
| Age (years) | 20 to 29 | 8 | 26.7 |
|
| 30 to 39 | 17 | 56.6 |
|
| 40 to 49 | 5 | 16.7 |
| Nº of children | 0 | 14 | 46.7 |
|
| 1 | 9 | 30.0 |
|
| 2 | 5 | 16.7 |
|
| 3 | 1 | 3.3 |
|
| More than 3 | 1 | 3.3 |
| Time since learned a university degree (years) | Less than 1 | 1 | 3.3 |
| 1 to 3 | 9 | 30.0 | |
| 4 to 6 | 4 | 13.3 | |
| 7 to 9 | 11 | 36.7 | |
|
| 10 and more | 5 | 16.7 |
| Time of work in the NICU (years) | Less than 1 | 8 | 26.6 |
| 1 to 3 | 15 | 50.0 | |
| 4 to 6 | 4 | 13.4 | |
| 7 to 9 | 3 | 10.0 |