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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)
  1. Pelotas, Brazil, 2010.