Table 5 The associations of drinking water and dietary habits with number of natural teeth stratified by living areas※
Models | Urban (N = 13,929) | Rural (N = 5,967) | ||
|---|---|---|---|---|
P | β (95 % CI) | P | β (95 % CI) | |
Model 1 | ||||
Drinking habits | ||||
Un-boiled water | Ref | Ref | ||
Boiled water | 0.085 | 0.323(-0.044 ~ 0.691) | 0.308 | -0.292(-0.852 ~ 0.269) |
Model 2 | ||||
Drinking water sources at around 60 years | ||||
Tap water | Ref | Ref | ||
Well | < 0.001 | -1.183(-1.394~ -0.971) | < 0.001 | -0.606(-0.909~ -0.303) |
Surface water | < 0.001 | -1.080(-1.386~ -0.774) | 0.042 | -0.412(-0.811~ -0.014) |
Spring | < 0.001 | -1.267(-1.761~ -0.773) | < 0.001 | -1.457(-2.065~ -0.850) |
Model 3 | ||||
Staple food | ||||
Rice | Ref | Ref | ||
Corn | 0.021 | -0.555(-1.027~ -0.082) | 0.651 | -0.120(-0.638 ~ 0.399) |
Wheat | < 0.001 | -0.639(-0.858~ -0.419) | < 0.001 | -0.768(-1.087~ -0.449) |
Rice and wheat | 0.381 | -0.119(-0.385 ~ 0.147) | 0.059 | 0.375(-0.014 ~ 0.765) |
Model 4 | ||||
Frequency of intake fresh fruit | ||||
Almost everyday | Ref | Ref | ||
Quite often | 0.273 | -0.175(-0.487 ~ 0.138) | 0.058 | -0.449(-0.914 ~ 0.016) |
Occasionally | 0.003 | -0.447(-0.737~ -0.158) | < 0.001 | -0.735(-1.073~ -0.397) |
Rarely or never | < 0.001 | -0.975(-1.291~ -0.659) | < 0.001 | -0.953(-1.342~ -0.565) |
P for trend | < 0.001 | -0.337(-0.431~ -0.243) | < 0.001 | -0.320(-0.446~ -0.193) |
Model 5 | ||||
Frequency of intake vegetables | ||||
Almost everyday | Ref | Ref | ||
Quite often | < 0.001 | -0.650(-0.843~ -0.458) | 0.115 | -0.309(-0.694 ~ 0.075) |
Occasionally | 0.004 | -0.409(-0.690~ -0.129) | 0.001 | -0.623(-0.985~ -0.260) |
Rarely or never | 0.047 | -0.608(-1.206~ -0.009) | 0.014 | -0.926(-1.661~ -0.191) |
P for trend | < 0.001 | -0.302(-0.413~ -0.192) | < 0.001 | -0.310(-0.456~ -0.164) |
Model 6 | ||||
Frequency of intake meat | ||||
Almost everyday | Ref | Ref | ||
Occasionally | 0.002 | -0.307(-0.504~ -0.111) | 0.230 | -0.167(-0.439 ~ 0.105) |
Rarely or never | 0.006 | -0.356(-0.611~ -0.102) | 0.905 | 0.021(-0.322 ~ 0.364) |
P for trend | 0.001 | -0.202(-0.324~ -0.079) | 0.876 | -0.013(-0.182 ~ 0.155) |
Model 7 | ||||
Frequency of intake fish | ||||
Almost everyday | Ref | Ref | ||
Occasionally | < 0.001 | -0.569(-0.784~ -0.355) | 0.496 | 0.113(-0.211 ~ 0.436) |
Rarely or never | < 0.001 | -0.785(-1.019~ -0.551) | 0.388 | -0.159(-0.518 ~ 0.201) |
P for trend | < 0.001 | -0.388(-0.505~ -0.272) | 0.266 | -0.101(-0.279 ~ 0.077) |