Table 1 Interactive q-statistic values (>0.6) between pairs of risk factors.

From: Ecological analysis of Kashin-Beck osteoarthropathy risk factors in Tibet’s Qamdo City, China

C = A ∩ B

A

B

D = A + B

Result

Interaction

TEC ∩ MI = 0.777

0.560

0.334

0.894

C < D; C > Max(A,B)

MI ∩ GDP = 0.760

0.334

0.314

0.648

C > D; C > Max(A,B)

↑↑

TEC ∩ STR = 0.731

0.560

0.467

1.027

C < D; C > Max(A,B)

STR ∩ GDP = 0.710

0.467

0.314

0.781

C < D; C > Max(A,B)

MI ∩ PRE = 0.689

0.334

0.294

0.628

C > D; C > Max(A,B)

↑↑

STR ∩ MI = 0.682

0.467

0.334

0.801

C < D; C > Max(A,B)

STR ∩ PRE = 0.679

0.467

0.294

0.761

C < D; C > Max(A,B)

TEC ∩ PRE = 0.674

0.560

0.294

0.854

C < D; C > Max(A,B)

TEC ∩ GDP = 0.673

0.560

0.314

0.874

C < D; C > Max(A,B)

TEC ∩ TEM = 0.640

0.560

0.051

0.611

C > D; C > Max(A,B)

↑↑

GDP ∩ PRE = 0.628

0.314

0.294

0.608

C > D; C > Max(A,B)

↑↑

TEC ∩ SOI = 0.614

0.560

0.117

0.677

C < D; C > Max(A,B)

  1. “↑”Denotes the bivariate enhancement of A and B; “↑↑”denotes the nonlinear enhancement of A and B. The risk factors include the following: TEC, STR, MI, GDP, PRE, SOI and TEM.