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Table 2 Distribution of Study Variables in the Population and Study Samples by Intervention Group

From: The effect of systematic pediatric care on neonatal mortality and hospitalizations of infants born with oral clefts

Variable Control Group Intervention Group
  Population Total Sample Sub-sample with Mortality Outcome Population Total Sample Sub-sample with Mortality Outcome
Overall Sample Size 499 456 441 707 663 602
Maternal Age 25.78 (6.89) 25.77 (6.94) 25.79 (6.89) 26.37 (6.92) 26.30 (6.86) 26.29 (6.86)
Number of prenatal visits 5.58 (3.01) 5.65 (2.95) 5.66 (2.94) 4.51 (3.51) 4.56 (3.51) 4.67 (3.51)
Maternal chronic illness (N) 469 431 419 702 659 598
   No (%) 395(84.2) 358 (83.1) 347 (82.8) 548 (78.1) 516 (78.3) 471 (78.8)
   Yes (%) 74(15.8) 73 (16.9) 72 (17.2) 154 (21.9) 143 (21.7) 127 (21.2)
Ethnic Ancestry (N) 465 427 416 691 652 592
   Black (%) 51(11.0) 51 (11.9) 50 (12.0) 81 (11.7) 77 (11.8) 68 (11.5)
   Native (%) 348(74.8) 313 (73.3) 303 (72.8) 523 (75.7) 492 (75.5) 449 (75.8)
   Other (%) 66(14.2) 63 (14.8) 63 (15.1) 87 (12.6) 83 (12.7) 75 (12.7)
Birth weight (grams) 2887.5 (788.5) 2,863.5 (797.8) 2870.8 (803.7) 2881.9 (740.3) 2,892.9(726.7) 2871.3 (732.2)
Gestational age (weeks) 38.3 (3.4) 38.3 (3.4) 38.3 (3.5) 38.5 (3.1) 38.5 (3.1) 38.4 (3.2)
Time of cleft diagnosis (N) 495 454 439 701 657 596
   Prenatal (%) 80 (16.2) 76 (16.7) 73 (16.6) 174 (24.8) 161 (24.5) 145 (24.3)
   Other (%) 415(83.8) 378 (83.3) 366 (83.4) 527 (75.2) 496 (75.5) 451 (75.7)
Sex (N) 491 450 437 705 661 601
   Male (%) 275(56.0) 250 (55.6) 245 (56.1) 394 (55.9) 372 (56.3) 338 (56.2)
   Female (%) 216(44.0) 200 (44.4) 192 (43.9) 311 (44.1) 289 (43.7) 263 (43.8)
Multiple birth (N) 496 455 440 707 663 602
   No (%) 484(97.6) 443 (97.4) 428 (97.3) 688 (97.3) 646 (97.4) 586 (97.3)
   Yes (%) 12 (2.4) 12 ( 2.6) 12 (2.7) 19 (2.7) 17 ( 2.6) 16 (2.7)
Associated Status (N) 499 456 441 707 663 602
   Isolated (%) 361(72.3) 325 (71.3) 313 (71.0) 478 (67.6) 451 (68.0) 405 (67.3)
   Associated (%) 138(27.7) 131 (28.7) 128 (29.0) 229 (32.4) 212 (32.0) 197 (32.7)
Type of Cleft (N) 496 455 441 706 663 602
   Palate only (%) 129(26.0) 121 (26.6) 118 (26.8) 197(27.9) 181 (27.3) 163 (27.1)
   Lip only (%) 87(17.5) 77 (16.9) 75 (17.0) 120(17.0) 111 (16.7) 101 (16.8)
   Lip and Palate (%) 280(56.5) 257 (56.5) 248 (56.2) 389(55.1) 371 (56.0) 338 (56.2)
Type of Delivery (N) 492 451 436 707 663 602
   Cesarean (%) 184(37.4) 168 (37.3) 163 (37.4) 280(39.6) 258 (38.9) 238 (39.5)
   Other (%) 308 (62.6) 283 (62.7) 273 (62.6) 427 (60.4) 405 (61.1) 364 (60.5)
  1. The Table includes the distribution of study variables in the study population, study sample and sample with mortality data. Means and standard deviations (in parentheses) are reported for continuous variables. Counts and percentages (in parentheses) are reported for categorical variables.
  2. The following comparisons were examined within each of the intervention and control groups: 1) population versus study sample and 2) study sample versus sample with mortality data.
  3. The differences in the number of observations in the subsamples with mortality outcome in this table and those included in mortality analysis in Table 1 is due to limiting the mortality analysis to those who were alive on the 7th day after birth. The subsamples with mortality outcome in Table 6 include all consented infants with known mortality outcome including those who died before the 7th day of life since the goal is to check for any characteristics that are related to dropping out of the study resulting in unknown mortality status.