Visible support p<0.001, PR=0.67 (0.56 - 0.80); informative and emotional support p=0.037, PR=0.79 (0.63 - 0.99); emotional support p=0.011, PR=0.75 (0.60 - 0.93); social interaction support p=0.015, PR=0.76 (0.60 - 0.95).