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Table 4 Characteristics of women who benefited from IFAS and women in the sample

From: Heckman-type selection models to obtain unbiased estimates with missing measures outcome: theoretical considerations and an application to missing birth weight data

  Full Sample N = 7325 IFAS n = 3260
Educational attainment
 Never attended school 4021 (54.9) 1869 (57.3)
 Primary school 2203 (30.1) 963 (29.5)
 Coranic 383 (5.2) 136 (4.2)
 Secondary school or higher 718 (9.8) 292 (9.0)
Literacy
 Can’t write and read 5394 (73.6) 2494 (76.5)
 Can read 342 (4.7) 138 (4.2)
 Can write and read 1589 (21.7) 628 (19.3)
Maternal age (years)
 15–19 1013 (13.8) 436 (13.4)
 20–34 5132 (70.1) 2281 (70.0)
 35–49 1180 (16.1) 543 (16.7)
Socioeconomic status
 Most poor 1482 (20.2) 727 (22.3)
 Poor 1453 (19.8) 715 (21.9)
 Middle 1477 (20.2) 665 (20.4)
 Rich 1510 (20.6) 730 (22.4)
 Most rich 1403 (19.2) 423 (13.0)
Marital status
 Single 787 (10.7) 304 (9.3)
 Common-law union 2942 (40.2) 1336 (41.0)
 Married 3541 (48.3) 1599 (49.1)
 Divorced/widowed 55 (0.8) 21 (0.6)
Previous births
 0 child 294 (4.0) 120 (3.7)
 1–4 children 5439 (74.3) 2437 (74.8)
  ≥ 5 children 1592 (21.7) 703 (21.5)
Place of birth
 Health facility 4198 (57.3) 1915 (58.7)
 Home 2917 (39.8) 1259 (38.6)
 Other place 210 (2.9) 86 (2.6)
Child sex
 Male 3696 (50.5) 1618 (49.6)
 Female 3629 (49.5) 1642 (50.4)
Child birthweight
  < 2500 g 563 (7.7) 297 (9.1)
  ≥ 2500 g 3947 (53.9) 2007 (61.6)
 Unknown 2815 (38.4) 956 (29.3)
Twin births  
 Yes 355 (4.8) 172 (5.3)
 No 6970 (95.2) 3088 (94.7)
Malaria
 Confirmed 3393 (46.3) 1609 (49.4)
 Not confirmed 3932 (53.9) 1651 (50.6)
Persistent fever
 Yes 2198 (30.0) 1072 (32.9)
 No 5127 (70.0) 2188 (67.1)
Lack of appetite
 Yes 1537 (21.0) 647 (19.8)
 No 5788 (79.0) 2613 (80.2)