Background data by job
| Field support staff | Irrigation repair workers | Seed cutters | Burned cane cutters | ||
| Demography | |||||
| Age, mean (SD) | 31 (7) | 29 (7) | 28 (7) | 31 (8) | |
| Sex (% female) | 49% | 52% | 27% | 0% | |
| Baseline kidney function | |||||
| eGFR mean (SD) | 107 (15) | 107 (17) | 103 (18) | 100 (18) | |
| eGFR <60 mL/min/1.73 m2, N (%) | 0 | 1 (1%) | 0 | 3 (2%) | |
| Questionnaire | |||||
| Number of previous harvests, median (IQR) | 7 (2–11) | 4 (2–6) | 4 (2–8) | 8 (4–13) | |
| First ever harvest, N (%) | 6 (10%) | 6 (5%) | 11 (6%) | 1 (1%) | |
| Fever during harvest 2, N (%) | 18 (31%) | 30 (23%) | 56 (29%) | 52 (28%) | |
| Most recent febrile episode due to sun, N (%) | 6 (10%) | 12 (9%) | 34 (17%) | 27 (15%) | |
| Chikungunya during harvest 2, N (%) | 1 (2%) | 1 (1%) | 1 (1%) | 2 (1%) | |
| Pesticide use during harvest 2, N (%) | 0 | 1 (1%) | 3 (2%) | 1 (1%) | |
| NSAID use during harvest 2, N (%) NSAID use during harvest 1, %* | 5 (8%) 15% | 20 (16%) 23% | 23 (12%) 21% | 25 (14%) 25% | |
| Current smoking in men, N (%) | 10 (33%) | 24 (39%) | 48 (33%) | 75 (41%) | |
| Current smoking in women, N (%) | 1 (1%) | 3 (4%) | 1 (2%) | – | |
| Self-reported diabetes at baseline, N (%) | 2 (3%) | 1 (1%) | 2 (1%) | 0 | |
| Hypertension at baseline (self-reported and/or measured (>140/90 mm Hg)), N (%) | 6 (10%) | 8 (6%) | 4 (2%) | 7 (4%) | |
| Previous day liquid intake (L) at end-harvest†, median (IQR) | Sugar-sweetened drink intake, 24 hours | 0.5 (0.2–0.8) | 0.5 (0.2–1.0) | 0.5 (0.2–1.0) | 0.6 (0.4–1.0) |
| Boli intake, 24 hours | 0.9 (0.3–1.2) | 1.2 (0.8–1.5) | 1.2 (0.9–1.5) | 1.2 (0.6–1.5) | |
| Water intake, 24 hours | 6 (4–8) | 8 (6–10) | 9 (7–11) | 10 (8–12) | |
| Water intake, breakfast to noon | 3 (2–4) | 5 (3–5) | 6 (5–8) | 8 (5–10) | |
| Liquid intake in excess of baseline report, 24 hours | 4 (2–6) | 7 (5–8) | 7 (5–9) | 8 (6–11) | |
*Harvest 1 data from Hansson et al.13
†Only collected for workers examined at end-harvest.
eGFR, estimated glomerular filtration rate; NSAID, non-steroidal anti-inflammatory drug.