Table 4.
Perinatal and Neonatal Health Outcomes
| Characteristics | CC-exclusive user | EC initiator | Quitter | p-value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N a | % (95% CI)b | RSE (%)c | N | % (95% CI) | RSE (%) | N | % (95% CI) | RSE (%) | ||
| Delivery method | 14 083 | 394 | 15 011 | .088 | ||||||
| Vaginal | 9057 | 66.7 (65.3, 68.0) | 1.0 | 251 | 65.1 (56.7, 72.8) | 6.1 | 9488 | 64.6 (63.3, 65.9) | 1.0 | |
| C-section | 5026 | 33.3 (32.0, 34.7) | 2.0 | 143 | 34.9 (27.2, 43.3) | 11.3 | 5523 | 35.4 (34.1, 36.7) | 1.8 | |
| Plurality | 13 703 | 372 | 14 707 | .681 | ||||||
| Singleton | 13 235 | 98.2 (97.9, 98.5) | 0.2 | 358 | 96.8 (91.7, 99.2) | 1.7 | 14 160 | 98.2 (97.9, 98.4) | 0.2 | |
| More than one | 468 | 1.8 (1.5, 2.1) | 8.4 | 14 | 3.2 (0.8, 8.3) | 51.0 | 547 | 1.8 (1.6, 2.1) | 7.9 | |
| Preterm birth | 14 051 | 394 | 14 997 | <.001 | ||||||
| No | 10 710 | 87.0 (86.2, 87.8) | 0.5 | 301 | 89.4 (84.6, 93.1) | 2.3 | 12 238 | 90.4 (89.7, 91.1) | 0.4 | |
| Yes | 3341 | 13.0 (12.2, 13.8) | 3.2 | 93 | 10.6 (6.9, 15.4) | 19.5 | 2759 | 9.6 (8.9, 10.3) | 3.5 | |
| Low birth weight | 14 081 | 395 | 15002 | <.001 | ||||||
| No | 9420 | 86.7 (86.0, 87.4) | 0.4 | 270 | 89.4 (85.2, 92.7) | 2.0 | 11 862 | 92.2 (91.7, 92.6) | 0.3 | |
| Yes | 4661 | 13.3 (12.6, 14.0) | 2.6 | 125 | 10.6 (7.3, 14.8) | 17.1 | 3140 | 7.8 (7.4, 8.3) | 3.1 | |
| SGA | 13 546 | 379 | 14 412 | <.001 | ||||||
| No | 10 088 | 80.7 (79.6, 81.8) | 0.7 | 293 | 83.1 (75.8, 89.0) | 3.8 | 12 407 | 90.4 (89.6, 91.1) | 0.4 | |
| Yes | 3458 | 19.3 (18.2, 20.4) | 2.9 | 86 | 16.9 (11.0, 24.2) | 18.9 | 2005 | 9.6 (8.9, 10.4) | 3.9 | |
aUnweighted sample size
bWeighted prevalence and 95% confidence interval
cRelative standard error of weighted prevalence with higher value indicates statistically unreliable estimation. Statistical analysis by a Rao-Scott Chi-square test.
CC = combustible cigarette; EC = e-cigarette; RSE = relative standard error.