Table 1. Changes in Birth Rates and Preterm Delivery Rates in 2017-2019 vs 2020.
| Period | Births, No. (%) | P valuea | ||
|---|---|---|---|---|
| 2017-2019 | 2020 | Total | ||
| Total births | ||||
| Overall | 140 346 (100) | 44 481 (100) | 184 827 (100) | .06 |
| March 14 to May 15 | 28 975 (20.65) | 9207 (20.7) | 38 182 (20.66) | .81 |
| May 16 to October 18 | 78 417 (55.87) | 25 070 (56.36) | 103 487 (55.99) | .07 |
| October 19 to December 31 | 32 954 (23.48) | 10 204 (22.94) | 43 158 (23.35) | .02 |
| Full term born infants (≥37 wk) | ||||
| Overall | 128 262 (91.39) | 40 943 (92.05) | 169 205 (91.55) | .18 |
| March 14 to May 15 | 26 457 (18.85) | 8472 (19.05) | 34 929 (18.9) | .78 |
| May 16 to October 18 | 71 721 (51.1) | 23 049 (51.82) | 94 770 (51.27) | .18 |
| October 19 to December 31 | 30 084 (21.44) | 9422 (21.18) | 39 506 (21.37) | .07 |
| Late preterm infants (32-36 wk) | ||||
| Overall | 9334 (6.65) | 2751 (6.18) | 12 085 (6.54) | .15 |
| March 14 to May 15 | 1927 (1.37) | 551 (1.24) | 2478 (1.34) | .48 |
| May 16 to October 18 | 5202 (3.71) | 1589 (3.57) | 6791 (3.67) | .06 |
| October 19 to December 31 | 2205 (1.57) | 611 (1.37) | 2816 (1.52) | .12 |
| Very preterm infants (<32 wk) | ||||
| Overall | 2064 (1.47) | 572 (1.29) | 2636 (1.43) | .01 |
| March 14 to May 15 | 445 (0.32) | 144 (0.32) | 589 (0.32) | .07 |
| May 16 to October 18 | 1097 (0.78) | 316 (0.71) | 1413 (0.76) | .37 |
| October 19 to December 31 | 522 (0.37) | 112 (0.25) | 634 (0.34) | .005 |
a
Calculated with Pearson test.