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Table 2 Mortality rate among twins (N = 1083) and singletons (N = 32,436) in the neonatal (0–28 days), post-neonatal (29–365 days) period and infancy (0–365 days) in the Basse HDSS, The Gambia, 2009–2013

From: The large contribution of twins to neonatal and post-neonatal mortality in The Gambia, a 5-year prospective study

  No. deaths Deaths per 1,000 live births 95 % CI c OR a 95 % CI c Adjusted OR b (Model1) 95 % CI c Adjusted OR c (Model2) 95 % CI d
Neonatal All e 508 15.2 13.9 16.5       
Singletons 448 13.8 12.5 15.1 1 (reference)   1 (reference)   1 (reference)  
Twins 60 55.4 41.8 69.0 4.19 3.01–5.82 4.33 3.09–6.06 4.86 3.38–6.99
Post neonatal All e 574 17.1 15.7 18.5       
Singletons 529 16.3 14.9 17.7 1 (reference)   1 (reference)   1 (reference)  
Twins 45 41.6 29.7 53.4 2.61 1.86–3.67 2.61 1.85–3.68 2.72 1.84–4.01
Infancy All e 1082 32.3 30.4 34.2       
Singletons 977 30.1 28.3 32.0 1 (reference)   1 (reference)   1 (reference)  
Twins 105 97.0 79.3 114.6 3.46 2.68–4.45 3.51 2.71–4.55 3.83 2.87–5.11
  1. a Odds Ratio
  2. b Odds ratio for twins compared to singletons adjusted for sex, year of birth, ethnicity, season of birth, mother age, birth order (N = 33,088)
  3. c Odds ratio for twins compared to singletons adjusted for sex, year of birth, ethnicity, season of birth, mother age, birth order, birth interval, access to water, SES index (N = 25,835)
  4. d 95 % confidence interval adjusted for clustering by household
  5. e Singletons and Twins