Table 2 The RRs of air pollution on the risk of scarlet fever from the DLNM model

1.034 (0.912–1.174)

1.071 (0.831–1.379)

1.108 (0.758–1.619)

1.147 (0.691–1.902)

1.077 (0.994–1.168)

1.161 (0.987–1.363)

1.251 (0.983–1.592)

1.348 (0.977–1.859)

1.066 (0.980–1.159)

1.137 (0.961–1.344)

1.212 (0.943–1.558)

1.292 (0.924–1.806)

1.029 (0.957–1.106)

1.058 (0.916–1.224)

1.089 (0.877–1.353)

1.121 (0.839–1.497)

0.994 (0.925–1.068)

0.988 (0.856–1.141)

0.982 (0.792–1.219)

0.977 (0.732–1.303)

0.987 (0.908–1.073)

0.974 (0.825–1.151)

0.962 (0.749–1.235)

0.949 (0.680–1.325)

1.034 (0.954–1.120)

1.069 (0.910–1.254)

1.105 (0.869–1.405)

1.142 (0.829–1.573)

1.172 (1.038–1.323)*

1.374 (1.078–1.749)*

1.610 (1.163–2.314)*

1.887 (1.163–3.061)*