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Table 1 Factors associated with not recalling a complete date-of-birth among children <5 years contributing survival time

From: Neonatal and child mortality data in retrospective population-based surveys compared with prospective demographic surveillance: EN-INDEPTH study

  Bandim Dabat IgangaMayuge Matlab Kintampo RR (95%CI) adjusted for HDSS site P value for interaction with sitea
Number of births 18423 16029 16044 32308 27013
Incomplete date-of-birthb 7% (1376/18423) 1% (146/16029) 6% (1010/16044) 2% (755/32308) 7% (1832/27013)
Recall period
 Born within past 2 years 2% (116/5045) 0% (12/3366) 2% (73/3426) 1% (57/8322) 2% (99/5572) 1 (ref) 0.39
 Born more than 2 years ago 9% (1260/13378) 1% (134/12663) 7% (937/12618) 3% (698/23986) 8% (1733/21441) 4.08 (3.67–4.55)  
Survival status
 Alive 6% (1129/17657) 1% (133/15639) 6% (898/15567) 2% (650/31591) 6% (1523/26299) 1 (ref) < 0.001
 Died before 5 years 32% (247/766) 3% (13/390) 23% (112/477) 15% (105/717) 43% (309/714) 5.82 (5.42–6.24)  
Sex
 Male 7% (682/9413) 1% (71/8026) 6% (511/8075) 2% (368/16044) 7% (914/13736) 1 (ref) 0.89
 Female 7% (631/8947) 1% (75/8003) 6% (499/7969) 2% (386/16263) 7% (918/13277) 1.01 (0.96–1.07)  
Education
 One 15% (996/6506) 1% (128/11113) 15% (246/1621) 9% (124/1407) 9% (1077/11918) 1 (ref) < 0.001c
 Primary school 5% (286/5475) 1% (17/3083) 7% (589/9049) 5% (344/6338) 5% (745/14142) 0.47 (0.44–0.51)  
 Secondary school 2% (84/5364) 0% (1/859) 3% (162/4703) 1% (285/20679) 1% (9/701) 0.15 (0.13–0.17)  
 Higher education 1% (8/1074) 0% (0/974) 2% (13/671) 0% (2/3884) 0% (1/252) 0.04 (0.02–0.06)  
 Missing 50% (2/4)       
Parity
 1 2% (48/2426) 0% (2/1259) 2% (27/1150) 1% (33/6345) 2% (40/1944) 1 (ref) < 0.001
 2 5% (193/3765) 0% (8/2218) 3% (52/1874) 1% (187/13040) 5% (202/3917) 2.33 (1.95–2.79)  
 3 7% (275/3817) 1% (15/2310) 3% (61/2171) 3% (245/8511) 6% (306/4847) 3.52 (2.95–4.20)  
 4 9% (263/3048) 1% (13/2505) 4% (90/2323) 6% (179/3147) 7% (326/4807) 4.41 (3.67–5.29)  
 5+ 11% (597/5367) 1% (108/7737) 9% (780/8526) 9% (111/1265) 8% (958/11498) 6.00 (5.05–7.14)  
Wealth quintiles
 Poorest 4% (127/3344) 1% (30/4644) 8% (336/4461) 4% (307/6877) 8% (482/5956) 1 (ref) < 0.001
 2 6% (211/3430) 1% (39/3281) 7% (252/3618) 3% (205/6476) 8% (467/5635) 1.00 (0.90–1.10)  
 3 8% (285/3537) 1% (48/3450) 7% (223/3012) 2% (119/6355) 7% (354/5402) 0.92 (0.83–1.02)  
 4 8% (274/3608) 1% (26/2679) 5% (137/2748) 1% (76/6274) 6% (312/5167) 0.76 (0.68–0.85)  
 Richest 11% (479/4504) 0% (3/1975) 3% (62/2205) 1% (48/6326) 4% (217/4853) 0.75 (0.67–0.83)  
  1. aInteraction with HDSS site tested in a separate model
  2. bComplete date-of-birth defined as day, month and year of birth provided. An incomplete date-of-birth includes all dates of birth missing at least one of day, month and/or year
  3. cTested by grouping secondary and higher education together