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Table 3 Incidence rates of morbidities and proportion of clinic visits and hospitalizations among children in bottled and municipal water cohorts

From: Burden of childhood diseases and malnutrition in a semi-urban slum in southern India

 

1st year

 

2nd year

 

Overall

Bottled water

Municipal water

P- value *

Overall

Bottled water

Municipal water

P- value *

 

(n=176)

(n=90)

(n=86)

 

(n=170)

(n=86)

(n=84)

 

All-cause morbidities:

No. of episodes

2331

1151

1180

---

1601

767

834

---

Rate of episodes/child-year (95% CI)

13.8 (13.1-14.7)

13.5 (12.4-14.8)

14.2 (13.2-15.3)

0.433

11.0 (10.3-11.8)

10.4 (9.3-11.7)

11.6 (10.7-12.6)

0.135

Episodes resulting in clinic visit: Number (% of total illness episodes)

1700 (72.9%)

847 (73.6%)

853 (72.3%)

0.480

1089 (68.0%)

515 (67.1%)

574 (68.8%)

0.472

Episodes resulting in hospitalization: Number (% of total illness episodes)

60 (2.6%)

39 (3.4%)

21 (1.8%)

0.014

26 (1.6%)

14 (1.8%)

12 (1.4%)

0.541

Respiratory morbidities:

No. of episodes

1506

693

813

---

860

388

472

---

Rate of episodes/child-year (95% CI)

8.9 (8.5-9.4)

8.1 (7.5-8.8)

9.8 (9.1-10.5)

0.001

5.9 (5.5-6.4)

5.3 (4.7-5.9)

6.6 (6.0-7.2)

0.003

Episodes resulting in clinic visit: Number (%of total illness episodes)

1299 (86.2%)

612 (88.3%)

687 (84.5%)

0.032

733 (85.2%)

333 (85.8%)

400 (84.7%)

0.657

Episodes resulting in hospitalization: Number (% of total illness episodes)

32 (2.1%)

18 (2.6%)

14 (1.7%)

0.240

13 (1.5%)

9 (2.3%)

4 (0.85%)

0.078

GI morbidities:

No. of episodes

668

367

301

---

384

184

200

---

Rate of episodes/child-year (95% CI)

4.0 (3.5-4.5)

4.3 (3.6-5.2)

3.6 (3.0-4.3)

0.162

2.6 (2.3-3.1)

2.5 (2.0-3.2)

2.8 (2.3-3.4)

0.483

Episodes resulting in clinic visit: Number (% of total illness episodes)

331 (49.6%)

197 (53.7%)

134 (44.5%)

0.019

197 (51.3%)

96 (52.2%)

101 (50.5%)

0.743

Episodes resulting in hospitalization: Number (% of total illness episodes)

18 (2.7%)

12 (3.3%)

6 (2.0%)

0.311

11 (2.9%)

5 (2.7%)

6 (3.0%)

0.868

Skin lesions:

No. of episodes

86

47

39

---

176

96

80

---

Rate of episodes/child-year (95% CI)

0.51 (0.38-0.70)

0.55 (0.36-0.89)

0.47 (0.33-0.70)

0.574

1.2 (0.99-1.5)

1.3 (0.99-1.8)

1.1 (0.8-1.5)

0.449

Episodes resulting in clinic visit: Number (% of total illness episodes)

34 (39.5%)

14 (29.8%)

20 (51.3%)

0.042

83 (47.2%)

45 (46.9%)

38 (47.5%)

0.934

Episodes resulting in hospitalization: Number (% of total illness episodes)

4 (4.7%)

4 (8.5%)

0 (0%)

0.062

1 (0.57%)

0 (0%)

1 (1.3%)

0.272

Other infections:

No. of episodes

47

26

21

---

88

54

34

---

Rate of episodes/child-year (95% CI)

0.28 (0.21-0.38)

0.31 (0.21-0.47)

0.25 (0.16-0.42)

0.537

0.61 (0.46-0.81)

0.73 (0.51-1.1)

0.47 (0.32-0.73)

0.118

Episodes resulting in clinic visit: Number (% of total illness episodes)

23 (52.3%)

13 (50%)

10 (47.6%)

0.871

34 (38.6%)

23 (42.6%)

11 (32.4%)

0.337

Episodes resulting in hospitalization: Number (% of total illness episodes)

5 (10.6%)

4 (15.4%)

1 (4.8%)

0.240

1 (1.1%)

0 (0%)

1 (2.9%)

0.205

Non-infectious morbidities:

No. of episodes

24

18

6

---

93

45

48

---

Rate of episodes/child-year (95% CI)

0.14 (0.09-0.22)

0.21 (0.13-0.35)

0.07 (0.03-0.23)

0.038

0.64 (0.51-0.81)

0.61 (0.44-0.87)

0.67 (0.50-0.92)

0.700

Episodes resulting in clinic visit: Number (% of total illness episodes)

13 (54.2%)

11 (61.1%)

2 (33.3%)

0.237

42 (45.2%)

18 (40%)

24 (50%)

0.333

Episodes resulting in hospitalization: Number (% of total illness episodes)

1 (4.2%)

1 (5.6%)

0 (0%)

0.555

0 (0%)

0 (0%)

0 (0%)

---

  1. * P-values obtained by comparing the rates in bottled and municipal cohorts using Poisson survival models with robust standard errors.