For convergent validity ( i.e. , the relationship between PAQs and other measures ) , similar overall associations were found between Past-week PAQs and Usual-week PAQs .
However , PAQs were more strongly associated with direct measures of physical activity ( e.g. , accelerometer ) than indirect measures of physical activity ( i.e. , physical fitness ) , irrespective of recall methods .
Only a few interview-administered PAQs exhibited positive ratings for a single psychometric property , although the other properties were either rated as poor or question able , demonstrating the limitations of current PAQs .
The Phone-FITT: a brief physical activity interview for older adults.
The purpose of this study was to develop a brief physical activity interview for older adults ( Phone-FITT ) and evaluate its test-retest reliability and validity . Summary scores were derived for household , recreational , and total PA . Reliability was evaluated in a convenience sample from a fall-prevention study ( N = 43 , 79.4 + /- 2.9 years , 51 % male ) , and validity , in a r and om sample of individuals in older adult exercise programs ( N = 48 , 77.4 + /- 4.7 years , 25 % male ) . Mean time to complete the Phone-FITT was 10 min for participants sample d from exercise programs . Evaluation of test-retest reliability indicated substantial to almost perfect agreement for all scores , with intraclass correlation coefficients ( 95 % confidence intervals ) ranging from .74 ( .58-.85 ) to .88 ( .8-.94 ) . For validity , Spearman 's rho correlations of  Phone-FITT scores with accelerometer counts ranged from .29 ( .01-.53 ) to .57 ( .34-.73 ) . Correlations of  Phone-FITT recreational scores with age and seconds to complete a self-paced step test ranged from -.29 ( -.53 to -.01 ) to -.45 ( -.68 to -.14 ) . This study contributes preliminary evidence of the reliability and validity of the Phone-FITT
For convergent validity ( i.e. , the relationship between PAQs and other measures ) , similar overall associations were found between Past-week PAQs and Usual-week PAQs .
However , PAQs were more strongly associated with direct measures of physical activity ( e.g. , accelerometer ) than indirect measures of physical activity ( i.e. , physical fitness ) , irrespective of recall methods .
Only a few interview-administered PAQs exhibited positive ratings for a single psychometric property , although the other properties were either rated as poor or question able , demonstrating the limitations of current PAQs .