Table 5 Logistic analysis for pregnant women with psychological distress (K6 ≥ 13) on the coast, inland of Miyagi, and in the 13 RCs

13 RCs(n = 67,882)

OR(95%CI)

ref

0.95(0.80–1.14)

1.14(0.97–1.35)

1.15(0.97–1.36)

1.21(1.03–1.42)

1.18(1.00–1.39)

Inland (n = 5015)

OR(95%CI)

1.86(1.29–2.68)

1.74(1.26–2.41)

1.85(1.34–2.56)

2.19(1.60–2.99)

1.67(1.18–2.38)

1.75(1.20–2.55)

Coast (n = 3255)

OR(95%CI)

2.05(1.27–3.31)

1.37(0.90–2.08)

1.10

(0.67–1.79)

1.47(0.97–2.24)

1.00(0.61–1.64)

2.06(1.30–3.27)

*Model 1

13 RCs(n = 67,882)

OR(95%CI)

ref

0.96(0.80–1.15)

1.15(0.97–1.37)

1.16(0.98–1.38)

1.22(1.08–1.44)

1.21(1.02–1.43)

Inland (n = 5015)

OR(95%CI)

1.60(1.10–2.33)

1.55(1.11–2.16)

1.55(1.11–2.16)

1.91(1.39–2.64)

1.54(1.08–2.20)

1.58(1.07–2.33)

Coast (n = 3255)

OR(95%CI)

1.75(1.07–2.87)

1.19(0.78–1.83)

0.99(0.60–1.62)

1.30(0.84–2.00)

0.87(0.52–1.44)

1.99

(1.25–3.18)

**Model 2

13 RCs(n = 67,882)

OR(95%CI)

ref

0.95(0.79–1.14)

1.18(0.99–1.40)

1.17(0.99–1.39)

1.26(1.07–1.49)

1.23(1.04–1.46)

Inland (n = 5015)

OR(95%CI)

1.52(1.04–2.22)

1.45(1.04–2.02)

1.51(1.08–2.11)

1.97(1.43–2.73)

1.58(1.10–2.26)

1.61(1.09–2.39)

Coast (n = 3255)

OR(95%CI)

1.41(0.860–2.306)

1.00(0.65–1.53)

0.92(0.56–1.52)

1.30(0.84–2.00)

0.87(0.53–1.46)

2.18(1.37–3.49)