Table 5 Sensitivity and specificity of the Netherlands Physical Activity Questionnaire according to different cut-off points.
From: Validation of the Netherlands physical activity questionnaire in Brazilian children
Cut-off point | Sensitivity (CI95%) | Specificity (CI95%) |
|---|---|---|
≥ 7 | 100.0 | 0.0 |
≥ 11 | 99.4 (96.9-100.0) | 0.0 (0.0-5.6) |
≥ 12 | 99.4 (96.9-100.0) | 1.6 (0.0-8.4) |
≥ 13 | 98.9 (95.9-99.9) | 1.56 (0.0-8.4) |
≥ 15 | 98.9 (95.9-99.9) | 3.1 (0.4-10.8) |
≥ 16 | 96.6 (92.7-98.7) | 4.7 (1.0-13.1) |
≥ 17 | 96.0 (91.9-98.4) | 10.9 (4.5-21.2) |
≥ 18 | 94.3 (89.7-97.2) | 17.2 (8.9-28.7) |
≥ 19 | 93.1 (88.3-96.4) | 20.3 (11.3-32.2) |
≥ 20 | 92.0 (86.9-95.6) | 25.0 (15.0-37.4) |
≥ 21 | 86.9 (80.9-91.5) | 26.6 (16.3-39.1) |
≥ 22 | 84.6 (78.4-89.6) | 31.3 (20.2-44.1) |
≥ 23 | 80.6 (73.9-86.2) | 32.8 (21.6-45.7) |
≥ 24 | 74.9 (67.8-81.1) | 42.2 (29.9-55.2) |
≥ 25 | 68.0 (60.5-74.8) | 50.0 (37.2-62.8) |
≥ 26 | 59.4 (51.8-66.8) | 60.9 (47.9-72.9) |
≥ 27 | 53.7 (46.0-61.3) | 68.8 (55.9-79.8) |
≥ 28 | 45.7 (38.2-53.4) | 68.8 (55.9-79.8) |
≥ 29 | 37.1 (30.0-44.8) | 71.9 (59.2-82.4) |
≥ 30 | 28.0 (21.5-35.3) | 87.5 (76.8-94.4) |
≥ 31 | 18.9 (13.4-25.5) | 93.8 (84.8-98.3) |
≥ 32 | 12.0 (7.6-17.8) | 98.4 (91.6-100.0) |
≥ 33 | 6.9 (3.6-11.7) | 98.4 (91.6-100.0) |
≥ 34 | 4.0 (1.6-8.1) | 100.0 (94.4-100.0) |
= 35 | 1.7 (0.4-4.9) | 100.0 (94.4-100.0) |