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Table 1 Overall proportion of cases and controls with exposure

From: Risk factors and their interaction on chronic kidney disease: A multi-centre case control study in Taiwan

  

CKD

non-CKD

Post power

Gender

Female

2302 (43.2 %)

2943 (57.3 %)

>99.9 %

Male

3026 (56.8 %)

867 (42.7 %)

 

Age

 

59.8 ± 15.2

54.0 ± 15.1

>99.9 %

Obesity (151 missing)

Normal

4634 (88.7 %)

4650 (91.4 %)

>99.9 %

Abnormal

592 (11.3 %)

436 (8.6 %)

 

Income (61 missing)

Low

3056 (57.6 %)

2039 (40.0 %)

 

Median

1416 (26.7 %)

1791 (35.1 %)

>99.9 %

High

832 (15.7 %)

1268 (24.9 %)

>99.9 %

HB (1 missing)

Normal

5027 (94.4 %)

5064 (93.9 %)

99.4 %

Abnormal

300 (5.6 %)

71 (6.1 %)

 

HC* (2 missing)

Normal

5228 (98.2 %)

5064 (98.6 %)

39.6 %

Abnormal

98 (1.8 %)

71 (1.4 %)

 

Hyperuricaemia (2 missing)

Normal

4036 (75.8 %)

4852 (94.5 %)

98.7 %

Abnormal

1291 (24.2 %)

282 (5.5 %)

 

Anaemia* (2 missing)

Normal

4463 (83.8 %)

4938 (96.2 %)

92.1 %

Abnormal

863(16.2 %)

197 (3.8 %)

 

Hyperlipidaemia (1 missing)

Normal

3832 (71.9 %)

4196 (81.7 %)

>99.9 %

Abnormal

1495 (28.1 %)

939 (18.3 %)

 

Smoking status (338 missing)

Never

3909 (76.0 %)

4126 (82.9 %)

>99.9 %

Ever

1237 (24.0 %)

853 (17.1 %)

 

Alcohol intake (382 missing)

Never

4361 (85.0 %)

4340 (87.6 %)

>99.9 %

Ever

767 (15.0 %)

613 (12.4 %)

 

Betel nut chewing* (456 missing)

Never

4876 (95.7 %)

4758 (96.9 %)

82.2 %

Ever

222 (4.3 %)

151 (3.1 %)

 

Exercise habits (173 missing)

Never

1862 (35.8 %)

1511 (29.7 %)

>99.9 %

Ever

3338 (64.2 %)

3579 (70.3 %)

 

Groundwater using (17 missing)

Never

5029 (94.5 %)

4890 (95.4 %)

96.6 %

Ever

293 (5.5 %)

234 (4.6 %)

 
  1. CKD: patients with CKD; non-CKD: patients without CKD; HB: hepatitis B; HC: hepatitis C
  2. §: Post power (1-β) estimate based on G*power [28]
  3. Boldface & *: the powers of each variable were less than 95 %, and they were defined as lacking in power
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BMC Nephrology

ISSN: 1471-2369

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