Table 3

Comparison of positive respiratory symptoms between treatment group and control group within a 3-month intervention
Items Treatment group (n = 50) Control group (n = 49) P value#
Chronic cough (positive %)
  Baseline 46/50 (92.0) 47/49 (95.9) 0.692
  3 month after 38/50 (76.0)* 45/49 (91.8) 0.032#
Chronic expectoration (positive %)
  Baseline 43/50 (86.0) 43/49 (87.8) 0.796
  3 month after 35/50 (70.0)* 37/50 (75.5)* 0.538
Asthma/Dyspnea (positive %)
  Baseline 14/50 (28.0) 18/49 (36.7) 0.353
  3 month after 12/50 (24.0) 15/49 (30.6) 0.460
Chronic angina (positive %)
  Baseline 20/50 (40.0) 19/49 (38.8) 0.901
  3 month after 21/50 (42.0) 16/49 (32.7) 0.336
Chronic bronchitis (positive %)
  Baseline 31/50 (62.0) 27/49 (55.1) 0.486
  3 month after 25/50 (50.0)* 26/49 (53.1) 0.761

* P < 0.05 when comparing these variables before versus after intervention in the treatment group or control group by using paired sample chi-square.

#P < 0.05 when comparing these variables between treatment group and control group by using chi-square.

Cai et al.

Cai et al. Nutrition Journal 2013 12:57   doi:10.1186/1475-2891-12-57

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