Variable | Univariate Linear Regression | Multiple Linear Regression | ||
---|---|---|---|---|
Coefficient estimates (Std. Error) | P-value | Coefficient estimates (Std. Error) | P-value | |
Employment status | ||||
    Not Employed | Reference |  |  | |
    Employed | − 2.73(1.07) | 0.01 | - | |
Economic status | ||||
    Weak | Reference |  |  | |
    Medium | 1.14(0.88) | 0.19 | - | |
    Good | 2.50(1.18) | 0.03 | - | |
Literacy | ||||
    Low | Reference | − 1.30(0.98) | 0.18 | |
    Diploma | -0.83(1.04) | 0.42 | ||
    High | − 3.07(0.94) | 0.001 | − 2.37(1.00) | 0.01 |
Ethnicity | ||||
    Fars | -7.33(2.16) | 0.001 | - | |
    Turkmen | − 6.71(2.19) | 0.002 | - | |
    Sistani | − 5.00(2.32) | 0.03 | - | |
    aother | Reference |  |  | |
Gravid | ||||
    1 | Reference |  |  | |
    2 | − 0.29(1.025) | 0.77 | - | |
    More than 3 | − 0.33 (0.99) | 0.73 | - | |
Living child | ||||
    1 | Reference |  |  | |
    2 | − 0.53(0.91) | 0.56 | − 1.37(1.28) | 0.28 |
    More than 3 | − 1.4 (1.10) | 0.20 | - 4.77(1.88) | 0.01 |
Infertility history | ||||
    No | Reference |  |  | |
    Yes | − 2.90(1.63) | 0.07 | - | |
Abortion history | ||||
    No | Reference |  |  | |
    Yes | - 0.17(0.88) | 0.84 | - | |
GA | ||||
- | − 0.93 (0.12) | < 0.001 | - 0.91(0.12) | <0.001 |