| Variables | N | Median (P25% - P75%) | Mean (Standard Deviation) | p-value* | |
| Thiol (mmol/L) |
| 197 | 0.47 (0.43 - 0.51) | 0.484 (±0.109) |
|
| Group II |
|
|
|
|
|
| Age | 5 - 11 years old | 104 | 0.46 (0.44 - 0.51) | 0.47 (±0.110) | 0.089 |
|
| 12 - 17 years old | 93 | 0.49 (0.44 - 0.50) | 0.49 (±0.109) |
|
| Sex | Male | 80 | 0.46 (0.44 - 0.50) | 0.48 (±0.122) | 0.302 |
|
| Female | 117 | 0.48 (0.44 - 0.51) | 0.48 (±0.100) |
|
| GSTM1 | Null | 52 | 0.47 (0.42 - 0.50) | 0.47 (±0.129) | 0.184 |
|
| Positive | 97 | 0.49 (0.44 - 0.52) | 0.50 (±0.118) |
|
| GSTT1 | Null | 9 | 0.44 (0.44 - 0.51) | 0.47 (±0.072) | 0.636 |
|
| Positive | 139 | 0.48 (0.44 - 0.51) | 0.49 (±0.125) |
|
| GSTP1 | Ile/Ile | 45 | 0.48 (0.44 - 0.51) | 0.48 (±0.061) | 0.073 |
|
| Ile/Val | 92 | 0.48 (0.44 - 0.50) | 0.49 (±0.145) |
|
|
| Val/Val | 14 | 0.52 (0.48 - 0.54) | 0.53 (±0.122) |
|
| Group II |
|
|
|
|
|
| Iron deficiency anemia | Yes | 37 | 0.47 (0.44 - 0.50) | 0.47 (±0.059) | 0.642 |
|
| No | 160 | 0.48 (0.44 - 0.51) | 0.49 (±0.118) |
|
| IgE specific to inhalant | Reactive | 119 | 0.47 (0.43 - 0.50) | 0.48 (±0.122) | 0.263 |
|
| Non-reactive | 78 | 0.48 (0.44 - 0.51) | 0.48 (±0.087) |
|
| C-reactive protein | <6 mg/L | 188 | 0.48 (0.44 - 0.51) | 0.48 (±0.095) | 0.357 |
|
| ≥6 mg/L | 09 | 0.43 (0.35 - 0.49) | 0.50 (±0.289) |
|
| Asthma | Yes | 36 | 0.45 (0.43 - 0.49) | 0.45 (±0.042) | 0.029 |
|
| No | 152 | 0.48 (0.44 - 0.51) | 0.48 (±0.114) |
|
| Pulmonary obstruction | Yes | 29 | 0.49 (0.44 - 0.53) | 0.51 (±0.148) | 0.140 |
|
| No | 163 | 0.47 (0.44 - 0.51) | 0.47 (±0.095) |
|
| Respiratory symptoms | Yes | 101 | 0.47 (0.44 - 0.51) | 0.48 (±0.075) | 0.688 |
|
| No | 93 | 0.48 (0.44 - 0.51) | 0.49 (±0.126) |
|
| Fish consumption | <3 times/week | 143 | 0.48 (0.44 - 0.51) | 0.49 (±0.122) | 0.514 |
|
| ≥3 times/week | 51 | 0.46 (0.44 - 0.51) | 0.47 (±0.058) |
|
| BMI | Normal | 161 | 0.47 (0.43 - 0.51) | 0.48 (±0.116) | 0.595 |
|
| Overweight | 26 | 0.48 (0.44 - 0.51) | 0.48 (±0.045) |
|
|
| Obesity | 08 | 0.48 (0.32 - 0.51) | 0.42 (±0.115) |
|
| Group III |
|
|
|
|
|
| Family income | <1 minimum wage | 43 | 0.49 (0.44 - 0.51) | 0.54 (±0.189) | 0.047 |
|
| 1 - 2 minimum wage | 68 | 0.46 (0.44 - 0.50) | 0.46 (±0.058) |
|
|
| ≥3 minimum wage | 76 | 0.47 (0.44 - 0.51) | 0.48 (±0.064) |
|
| Parents schooling | Pre and elementary school | 79 | 0.48 (0.44 - 0.51) | 0.51 (±0.153) | 0.520 |
|
| Middle school | 64 | 0.47 (0.45 - 0.50) | 0.47 (±0.057) |
|
|
| High school | 50 | 0.49 (0.46 - 0.53) | 0.48 (±0.059) |
|