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Table 3 Assessing the validity of GPPAQ questionnaire data using accelerometry data as the “gold standard”

From: Evaluation of reliability and validity of the General Practice Physical Activity Questionnaire (GPPAQ) in 60–74 year old primary care patients

  

All N = 289

Retired/Not working N = 193

Working N = 96

Baseline accelerometry

 Those achieving DH Physical Activity guidelines of 150 min of MVPA in 10 min bouts1

69 (24 %)

50 (26 %)

19 (20 %)

Baseline GPPAQ Physical Activity Index

 Not active:

GPPAQ Inactive

152 (53 %)

116 (60 %)

36 (38 %)

 

GPPAQ Moderately inactive

35 (12 %)

18 (9 %)

17 (18 %)

 

GPPAQ Moderately active

55 (19 %)

29 (15 %)

26 (27 %)

 Active:

GPPAQ Active

47 (16 %)

30 (16 %)

17 (18 %)

Sensitivity of GPPAQ to identify “Active” individuals

 

19 % (13/69)

18 % (9/50)

21 % (4/19)

Specificity of GPPAQ to identify “Not active” individuals

 

85 % (186/220)

85 % (122/143)

83 % (64/77)

Baseline GPPAQ-Walk Physical Activity Index2

 Not active:

GPPAQ Inactive

123 (43 %)

97 (50 %)

26 (27 %)

 

GPPAQ Moderately inactive

30 (10 %)

15 (8 %)

15 (16 %)

 

GPPAQ Moderately active

44 (15 %)

20 (11 %)

24 (25 %)

 Active:

GPPAQ Active

92 (32 %)

61 (32 %)

31 (32 %)

Sensitivity of GPPAQ-walk to identify “Active” individuals

39 % (27/69)

40 % (20/50)

37 % (7/19)

 

Specificity of GPPAQ-walk to identify “Not active” individuals

70 % (155/220)

71 % (102/143)

69 % (53/77)

 
  1. 1. DH Guidelines recommend at least 150 min of MVPA in bouts of at least 10 mins
  2. 2. GPPAQ-Walk additionally classifies those who walk ≥3 h per week at a “brisk” or “fast” pace as active