|  |  |  | N (%) | |||
---|---|---|---|---|---|---|---|
 | Limb deficiency defect | N | Mean (SD) | Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 |
Nitrate (mg/day) | Â | Â | Â | Â | Â | Â | |
 | Longitudinal | 245 | 47.12 (31.52) | 73 (29.8) | 55 (22.4) | 60 (24.5) | 57 (23.3) |
 | Transverse | 379 | 46.97 (33.93) | 101 (26.6) | 105 (27.7) | 95 (25.1) | 78 (20.6) |
 | Intercalary | 34 | 45.84 (24.04) | 10 (29.4) | 7 (20.6) | 7 (20.6) | 10 (29.4) |
 | Preaxial* | 143 | 45.19 (30.13) | 46 (32.2) | 32 (22.4) | 34 (23.8) | 31 (21.7) |
Nitrite (mg/day) | Â | Â | Â | Â | Â | Â | |
 | Longitudinal | 245 | 1.76 (0.96) | 73 (29.8) | 50 (20.4) | 54 (22.0) | 68 (27.8) |
 | Transverse | 379 | 1.80 (1.00) | 95 (25.1) | 102 (26.9) | 86 (22.7) | 96 (25.3) |
 | Intercalary | 34 | 1.86 (0.88) | 5 (14.7) | 9 (26.5) | 7 (20.6) | 13 (38.2) |
 | Preaxial* | 143 | 1.78 (1.02) | 42 (29.4) | 33 (23.1) | 31 (21.7) | 37 (25.9) |
Animal Nitrite (mg/day) | Â | Â | Â | Â | Â | Â | |
 | Longitudinal | 247 | 1.12 (0.79) | 66 (26.7) | 59 (23.9) | 64 (25.9) | 58 (23.5) |
 | Transverse | 381 | 1.12 (0.77) | 99 (26.0) | 94 (24.7) | 90 (23.6) | 98 (25.7) |
 | Intercalary | 34 | 1.26 (0.82) | 5 (14.7) | 7 (20.6) | 9 (26.5) | 13 (38.2) |
 | Preaxial* | 145 | 1.15 (0.87) | 38 (26.2) | 37 (25.5) | 36 (24.8) | 34 (23.4) |
Plant Nitrite (mg/day) | Â | Â | Â | Â | Â | Â | |
 | Longitudinal | 247 | 0.64 (0.36) | 64 (25.9) | 63 (25.5) | 56 (22.7) | 64 (25.9) |
 | Transverse | 381 | 0.68 (0.42) | 101 (26.5) | 89 (23.4) | 83 (21.8) | 108 (28.3) |
 | Intercalary | 34 | 0.60 (0.29) | 8 (23.5) | 9 (26.5) | 10 (29.4) | 7 (20.6) |
 | Preaxial* | 145 | 0.63 (0.34) | 37 (25.5) | 39 (26.9) | 33 (22.8) | 36 (24.8) |
Nitrosamine (μg/day) |  |  |  |  |  |  | |
 | Longitudinal | 245 | 0.56 (0.46) | 65 (26.5) | 62 (25.3) | 55 (22.4) | 63 (25.7) |
 | Transverse | 380 | 0.82 (5.82) | 100 (26.3) | 99 (26.1) | 91 (23.9) | 90 (23.7) |
 | Intercalary | 34 | 0.63 (0.30) | 4 (11.8) | 9 (26.5) | 11 (32.4) | 10 (29.4) |
 | Preaxial* | 143 | 0.52 (0.31) | 41 (28.7) | 34 (23.8) | 33 (23.1) | 35 (24.5) |