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Table 6 Longitudinal modeling of MOD+PA level using generalized estimating equation

From: A RCT to evaluate a totally automated, culturally-adapted telephone counselor for increasing physical activity among physically inactive individuals in China

  Non-interaction model Interaction model
β 95% CI p-value β 95% CI p-value
TLC-PA-China 55.28 (41.482, 69.087) < 0.001 12.73 (5.105, 20.347) 0.001
Time (months) 12.74 (10.207, 15.276) < 0.001 5.35 (2.792, 7.899) < 0.001
TLC-PA-China*Time 14.21 (9.596, 18.826) < 0.001
Baseline MOD+PA 0.76 (0.568, 0.949) < 0.001 0.76 (0.567, 0.974) < 0.001
Gender 11.90 (−3.271, 27.070) NS 11.79 (−3.370, 26.957) NS
Age 0.484 (−0.571, 1.540) NS 0.489 (−0.566, 1.545) NS
  1. Study was conducted at Shenzhen, China between July and August 2009
  2. NS: Not significant at α = 0.05
  3. Note Results are estimated for a linear outcome and exchangeable working correlations
  4. The asterisks indicate which variables are involved in the interaction