Table 1.
Characteristics | Mean serum retinol Level (μmol/L) | t-value | P- value | |
Gender | Male(n = 188) | 1.66 ± 0.45 | 0.318 | 0.751 |
Female(n = 169) | 1.65 ± 0.49 | |||
Residential regions | Urban(n = 189) | 1.66 ± 0.49 | 0.078 | 0.938 |
Rural(n = 168) | 1.63 ± 0.43 |