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Table 1 Socio-demographic character istics of cases and controls

From: Environmental, maternal, and reproductive risk factors for childhood acute lymphoblastic leukemia in Egypt: a case-control study

Socio-demographic characteristic Cases (n = 299) Controls (n = 351) OR (95 % CI)a P value
Age of the child    -
 Mean (95 % CI) in months 61.0 (56.8 to 65.3) 70.2 (65.7 to 74.7) 0.004
Sex
 Male N (%) 178 (59.5) 203 (57.8) 1.07 (0.74 to 1.46) 0.69
Maternal urban/rural residence
 Rural residence N (%) 103 (34.4) 129 (36.7) 0.90 (0.65 to 1.25) 0.57
Location in Cairo vs elsewhere
 Cairo metropolitan area N (%) 123 (41.1) 139 (39.6) 1.07 (0.78 to 1.47) 0.77
Cancer in relatives
 Yes N (%) 55 (18.4) 60 (17.1) 1.08 (0.72 to 1.63) 0.89
Maternal age group
  ≤ 22 years-N (%) 69 (23.1) 111 (31.6) Reference
 23-29 years-N (%) 153 (51.2) 165 (47.0) 1.49 (1.02 to 2.16)
 30+ yr-N (%) 77 (25.7) 75 (21.4) 1.65 (1.06 to 2.55)
    P for trend: 0.02
Maternal Education level
 Secondary or higher education N (%) 226 (75.6) 211 (60.1) 2.05 (1.46 to 2.88) <0.001
  1. anot adjusted