Table 1 Demographic characteristics of study participants
Characteristics | Controls | NP+ve cases | NP-ve cases | |||
|---|---|---|---|---|---|---|
n | (%) | n | (%) | n | (%) | |
Sex | ||||||
Male | 250 | (31.3) | 154 | (32.4) | 136 | (33.3) |
Female | 549 | (68.7) | 321 | (67.6) | 273 | (66.7) |
Age (years) | ||||||
20-29 | 41 | (5.1) | 24 | (5.1) | 31 | (7.6) |
30-39 | 113 | (14.1) | 91 | (19.2) | 81 | (19.8) |
40-49 | 263 | (32.9) | 157 | (33.1) | 124 | (30.3) |
50-59 | 256 | (32.0) | 150 | (31.6) | 131 | (32.0) |
≥ 60 | 126 | (15.8) | 53 | (11.2) | 42 | (10.3) |
Ethnicity | ||||||
White | 791 | (99.0) | 432 | (90.9) | 394 | (96.3) |
South Asian | 1 | (0.1) | 24 | (5.1) | 8 | (2.0) |
Other | 7 | (0.9) | 19 | (4.0) | 7 | (1.7) |