Table 3: Logistic regression analysis of the association size of the network and social contacts in both groups.

VariableEnvironmental group (model 1)Control group (model 2)
PHazard ratio95% CI of HRPHazard ratio95% CI of HR
Lower limitUpper limitLower limitUpper limit

Coexistence
Alone (basal)11
Spouse0.2111.0680.8061.4340.3251.0890.7941.387
Son/daughter0.0191.2890.9891.680.3890.9950.7911.335
Siblings0.0031.3351.1191.9880.1691.10.8331.469
Other people0.0081.4991.1081.9950.0481.2850.8861.893
Contacts and weekly visits
>5 (basal)11
2–4 per week0.4991.4010.7991.1320.4280.8240.6591.089
1-2 per week0.5991.0480.7951.2440.111.080.881.386
00.241.220.781.2490.2290.7950.4951.081
Times to visit the social network
>1-2 day (basal)11
2–5 per week0.6991.0240.8421.2030.5041.0790.7651.109
1-2 per week0.2971.0970.8651.2590.0691.1820.8951.34
00.11.1230.8891.2950.8970.9240.8281.829

Note: model 1 was adjusted by sociodemographic variables in the experimental group; model 2 was adjusted by sociodemographic variables in the control group; 95% CI of HR = confidence interval for b.