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Table 4 Association of maternal and infant baseline with infant death rate at different child age in univariable Cox regressions in a cohort of 866 live births in Banfora Health District (Burkina Faso)

From: The high burden of infant deaths in rural Burkina Faso: a prospective community-based cohort study

Exposure variables 0 to 6 months (1st half of infancy) 1-12 months (postneonatal period) 0 to 12 months (overall infancy)
PYO No of deaths MRsa HRb PYO No of deaths MRsa HRb PYO No of deaths MRsa HRb
[95% CI] [95% CI] [95% CI]
Area of residence             
 ▪ Banfora 198.3 43 217 1.7 [0.8-3.5] 356.3 29 81 1.1 [0.5-2.5] 387.7 56 144 1.6 [0.8-2.9]
 ▪ Soubakenedougou 102.1 13 127 1 183.9 13 70 1 200.0 18 90 1
 ▪ Sideradougou 106.6 19 178 1.4 [0.7-2.8] 191.6 16 83 1.2 [0.6-2.4] 208.6 24 115 1.3 [0.7-2.3]
Distance to nearest health facility
 ▪ ≤5 km 192.9 44 228 1.5 [0.9-2.7] 346.7 28 81 1.0 [0.6-1.7] 377.5 55 146 1.4 [0.9-2.2]
 ▪ >5 km 214. 31 145 1 385.2 30 79 1 418.8 43 103 1
Maternal age             
 ▪ <20 61.9 12 193 1.6 [0.5-5.2] 111.8 9 80 3.1 [0.6-15.0] 121.6 17 140 1.9 [0.6-6.5]
 ▪ 20-35 302.4 58 192 1 542.6 47 87 1 590.6 75 127 1
 ▪ >35 42.6 5 11 1.6 [0.6-4.1 77.4 2 26 3.3 [1.0-11.2] 84.1 6 71 1.7 [0.7-4.4]
Maternal parity             
 ▪ 0 63.8 15 235 1.4 [0.6-3.2] 115.0 10 87 1.0 [0.4-2.3] 125.2 19 152 1.3 [0.6-2.8]
 ▪ 1 65.9 13 197 1.2 [0.5-2.9] 118.8 11 51 1.1. [0.4 2.9] 129.2 17 131 1.1 [0.5-2.6]
 ▪ 2-4 193.1 31 160 1.2 [0.6-2.1 346.3 29 58 1 376.9 43 114 1
 ▪ 5+ 84.0 16 190 1 151.8 8 26 0.6 [0.3-1.3] 165.0 19 115 1.0 [0.6-1.7]
History of child deathc             
 ▪ Yes 201.1 40 199 1.4 [0.8-2.3] 359.6 35 97 1.8 [0.8-4.2] 391.5 54 138 1.5 [1.0-2.3]
 ▪ No 142.0 20 141 1 257.3 13 50 1 279.5 25 89 1
Polygynous household             
 ▪ Yes 194.3 47 242 1.8 [1.0-3.3] 345.6 37 107 1.9 [0.9-4.1] 376.7 61 162 1.8 [1.0-3.3]
 ▪ No 212.6 28 131 1 386.3 21 54 1 419.6 37 88 1
Maternal education             
 ▪ None 326.8 61 187 1.5 [0.7-3.3] 586.5 49 83 3.8 [0.5-27.0] 638.4 78 122 2.0 [0.9-4.3]
 ▪ Literacy/primary school 55.2 11 199 1.6 [0.6-4.6]1 99.8 8 80 3.6 [0.4-32.0] 108.5 17 157 2.5 [1.0-6.4]
 ▪ Secondary school 24.9 3 120 1 45.5 1 22 1 49.4 3 61 1
Socio-economic statusd             
 ▪ Q1 (most poor) 86.6 13 150 1 157.4 8 51 1 171.1 17 99 1
 ▪ Q2 73.5 21 286 1.9 [0.8-4.6] 131.2 12 91 1.8 [0.7-4.5] 142.9 26 182 1.8 [0.8-4.1]
 ▪ Q3 83.8 16 191 1.3 [0.6-2.7] 150.1 13 87 1.7 [0.7-4.2] 163.5 21 128 1.3 [0.7-2.4]
 ▪ Q4 83.5 11 132 0.9 [0.4-2.1] 151.6 8 53 1.0 [0.3-3.5] 164.5 14 85 0.8 [0.4-1.9]
 ▪Q5 (less poor) 79.5 14 176 1.2 [0.6-2.3] 141.5 17 120 2.3 [1.1-4.9] 154.2 20 130 1.3 [08–2.0]
Mother sleeps under bednet             
 ▪ Yes 156.7 25 159 1 284.1 16 56 1 308.7 32 103 1
 ▪ No 250.2 50 200 1.2 [0.6-2.5] 447.8 42 94 1.6 [1.0-2.8] 487.6 66 135 1.3 [0.7-2.2]
Antenatal care visit             
 · 0 112.2 20 178 1.2 [0.5-2.7] 203.1 13 64 0.9 [0.4-1.7] 221.0 25 113 1.1 [0.6-2.0]
 · 1-2 218.2 44 201 1.4 [0.7-2.7] 390.5 35 89 1.2 [0.7-2.1] 425.1 58 136 1.3 [0.8-2.2]
 · >2 76.5 11 144 1 138.2 10 72 1 150.2 15 100 1
Birth attendant             
 ▪ Health personnel 154.2 28 181 1 275.4 31 112 1 299.7 41 137 1
 ▪ TBA/family/other 252.7 47 186 1.0 [0.7-1.5] 456.5 27 59 0.5 [0.3-8] 496.6 57 115 0.8 [0.6-1.2]
Season of delivery             
 ▪ Dry season (Nov-Apr) 189.1 40 211 1.3 [0.9-2.0] 339.7 26 76 0.9 [0.6-1.3] 369.6 50 135 1.2 [0.8-1.7]
 ▪ Rainy season (May-Oct) 217.8 35 160 1 392.2 32 81 1 426.7 48 112 1
Sex of newborn             
 ▪ Girl 201.7 32 158 1 362.8 29 80 1 394.6 48 121 1
 ▪ Boy 205.2 43 209 1.3 [0.8-2.1] 369.0 29 78 1.0 [0.6-1.6] 401.7 50 124 1.0 [0.7-1.5]
Twin births             
 ▪ Yes 13.3 18 1349 8.3 [4.8-14.5] 21.5 10 465 6.7 [3.12.7] 24.0 21 876 7.7 [4.6-12.8]
 ▪ No 393.6 57 145 1 710.4 48 67 1 772.3 77 100 1
Low anthropometric z-scores at week-3e
 · Yes 101.9 18 177 4.0 [1.5-10.5] 180.3 25 138 3.2 [1.8-5.7] 196.5 27 137 3.2 [1.8-5.9]
 · No 253.1 11 43 1 461.0 20 43 1 500.2 21 42 1
  1. aMortality rates (MRs) per 1000 person-years of observation (PYO).
  2. bAll crude analyses adjusted for the cluster-design of the main EBF-study and estimates of HRs are with robust standard errors.
  3. cRestricted only to multiparous mothers.
  4. dSee Table 1 for computation of the index of household assets.
  5. eApplicable only to those with weight or height measured at week-3 visit (±7 days, N = 723).