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Table 3 Types of methodological approaches

From: Measuring the association of objective and perceived neighborhood environment with physical activity in older adults: challenges and implications from a systematic review

Category n References
1 Direct comparison 6 [53, 104, 119, 121, 124, 127]
2 Indirect comparison 7 [122, 123, 126, 128, 138, 139, 149]
3 Interaction/moderation 7 [125, 130, 131, 137, 146,147,148]
4 Modeling/stratification 3 [140, 151, 152]
5 Combination 12 [40, 82, 120, 129, 132,133,134, 136, 143,144,145, 153]