Table 6 Positive and negative predictive values to different cut-off points of the Netherlands Physical Activity Questionnaire
From: Validation of the Netherlands physical activity questionnaire in Brazilian children
Cut-off point | Positive predictive value (CI95%) | Negative predictive value (CI95%) |
|---|---|---|
≥ 7 | ||
≥ 11 | 73.1 (67.0-78.6) | 0.0 (0.0-97.5) |
≥ 12 | 73.4 (67.3-78.9) | 50.0 (1.3-98.7) |
≥ 13 | 73.3 (67.2-78.8) | 33.3 (0.8-90.6) |
≥ 15 | 73.6 (67.5-79.1) | 50.0 (6.8-93.2) |
≥ 16 | 73.5 (67.3-79.1) | 33.3 (7.5-70.1) |
≥ 17 | 74.7 (68.5-80.2) | 50.0 (23.0-77.0) |
≥ 18 | 75.7 (69.4-81.2) | 52.4 (29.8-74.3) |
≥ 19 | 76.2 (69.9-81.7) | 52.0 (31.3-72.2) |
≥ 20 | 77.0 (70.7-82.6) | 53.3 (34.3-71.7) |
≥ 21 | 76.4 (69.9-82.1) | 42.5 (27.0-59.1) |
≥ 22 | 77.1 (70.5-82.8) | 42.6 (28.3-57.8) |
≥ 23 | 76.6 (69.8-82.5) | 38.2 (25.4-52.3) |
≥ 24 | 78.0 (70.9-84.0) | 38.0 (26.8-50.3) |
≥ 25 | 78.8 (71.4-85.0) | 36.4 (26.4-47.3) |
≥ 26 | 80.6 (72.7-87.0) | 35.5 (26.6-45.1) |
≥ 27 | 82.5 (74.2-88.9) | 35.2 (26.9-44.2) |
≥ 28 | 80.0 (70.8-87.3) | 31.7 (24.0-40.1) |
≥ 29 | 78.3 (67.9-86.6) | 29.5 (22.5-37.3) |
≥ 30 | 86.0 (74.2-93.7) | 30.8 (24.2-38.0) |
≥ 31 | 89.2 (74.6-97.0) | 29.7 (23.5-36.5) |
≥ 32 | 95.5 (77.2-99.9) | 29.0 (23.1-35.6) |
≥ 33 | 92.3 (64.0-99.8) | 27.9 (22.1-34.2) |
≥ 34 | 100.0 (59.0-100.0) | 27.6 (21.9-33.8) |
= 35 | 100.0 (29.2-100.) | 27.1 (21.6-33.3) |