Table 1.
Baseline characteristics of 3553 primary school students in rural China included in trial of information, subsidies, and incentives for reducing anaemia. Values are numbers (percentages (95% CI)) of students in trial arm unless specified otherwise
| Characteristic | Trial arm* | |||
|---|---|---|---|---|
| Control (n=1623 students, 27 schools) | Information (n=596 students, 15 schools) | Subsidy (n=667 students, 15 schools) | Incentive (n=667 students, 15 schools) | |
| Mean (95% CI) haemoglobin concentration (altitude adjusted g/L) | 126 (123 to 128) | 125 (120 to 129) | 124 (119 to 129) | 124 (119 to 129) |
| Anaemic (haemoglobin <115 g/L) | 338 (20.8 (14.4 to 27.3)) |
130 (21.8 (9.9 to 33.7)) |
160 (24.0 (12.4 to 35.5)) |
161 (24.1 (10.3 to 38.0)) |
| Female | 778 (47.9 (46.2 to 49.7) |
281 (47.2 (45.0 to 49.3) |
317 (47.5 (43.2 to 51.9) |
319 (47.8 (43.0 to 52.7) |
| Mean (95% CI) age (months) | 123.3 (120.6 to 125.9) | 124.7 (121.8 to 127.6) | 123.4 (118.4 to 128.3) | 120.5 (116.4 to 124.7) |
| Boarding student | 554 (34.1 (25.5 to 42.8)) |
248 (41.6 (29.3 to 53.9)) |
236 (35.4 (24.1 to 46.7)) |
244 (36.6 (30.5 to 42.7)) |
| Migrant mother | 386 (23.8 (15.3 to 32.3)) |
156 (26.2 (16.7 to 35.6)) |
158 (23.7 (8.3 to 39.0)) |
165 (24.7 (14.5 to 35.0)) |
| Mother has primary school education or less | 1403 (86.4 (80.8 to 92.1)) |
545 (91.4 (86.8 to 96.1)) |
572 (85.8 (77.9 to 93.6)) |
569 (85.3(78.8 to 91.8)) |
*Control arm (no intervention); information arm (school principals received information about anaemia); subsidy arm (principals received information and unconditional subsidies for reducing anaemia); incentive arm (principals received information, subsidies, and financial incentives for reducing anaemia).