Table 1

Demographic characteristics of ALL cases and controls

Cases (n = 1138)Controls (n = 2962)P
Gender
Male671 (59.0%)1700 (57.4%)
Female467 (41.0%)1262 (42.6%)0.36
Age (yrs)
<142 (3.7%)252 (8.5%)
1–4649 (57.0%)1304 (44.0%)
5–9318 (27.9%)893 (30.1%)
10+129 (11.3%)513 (17.3%)<0.01
Degree of urbanization
Urban398 (35.0%)1065 (36.0%)
Mixed412 (36.2%)1032 (34.8%)
Rural328 (28.8%)865 (29.2%)0.71
Socioeconomic status
Other855 (75.1%)2112 (71.3%)
High283 (24.9%)850 (28.7%)0.01
Study parta
LSP144 433
NIP481 688
WGP6502057
  • a Because some subjects fulfilled the eligibility criteria of more than one study part, the sum of participants for the individual studies is larger than the total when all study parts are combined.