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Table 2 Tolvaptan exposure and follow-up

From: Effects of tolvaptan discontinuation in patients with autosomal dominant polycystic kidney disease: a post hoc pooled analysis

  

Cohort 1

 ≥ 2 on treatment, ≥ 2 post-treatment assessments

Cohort 2

 ≥ 1 on treatment, ≥ 1 post-treatment assessments

Characteristic

Statistic or Category

eGFR Analysis

(n = 20)

TKV Analysis

(n = 11)

eGFR Analysis

(n = 82)

TKV Analysis

(n = 88)

Prior exposure to tolvaptan

Yes

0

0

4 (5%)

16 (18%)

No

20 (100%)

11 (100%)

78 (95%)

72 (82%)

Treatment duration, years

Mean (SD)

2.2 (1.1)

3.1 (0.3)

2.8 (0.7)

3.1 (0.7)

Min, Max

0.6, 3.9

2.8, 3.9

0.6, 4.4

1.0, 4.5

Duration of post-tolvaptan follow-up, years

Mean (SD)

3.6 (1.1)

2.1 (0.5)

1.5 (1.3)

1.2 (0.8)

Min, Max

1.9, 5.1

1.3, 2.9

0.5, 5.1

0.5, 4.6

Average daily tolvaptan dose, mg/daya

Mean (SD)

81.6 (28.2)

83.7 (25.6)

97.4 (25.1)

93.0 (26.1)

Median

73.7

80.6

112.6

101.1

Q1, Q3

55.9, 118.4

60.3, 119.1

80.6, 119.1

62.2, 118.0

Min, Max

42.1, 119.3

54.7, 119.3

42.1, 119.6

42.1, 119.6

Completion/termination status

Completed

7 (35%)

8 (73%)

69 (84%)

78 (89%)

Discontinued treatment early

13 (65%)

3 (27%)

13 (16%)

10 (11%)

Reason for discontinuationb

Adverse events

8 (62%)

1 (33%)

8 (62%)

6 (60%)

Subject met withdrawal criteria

1 (8%)

0

1 (8%)

0

Subject withdrew consent

4 (31%)

2 (67%)

4 (31%)

4 (40%)

Number of on-treatment eGFR assessments

Mean (SD)

8 (3.5)

 

10 (2.6)

 

Median

9

 

10

 

Q1, Q3

5, 10

 

9, 10

 

Min, Max

2, 15

 

2, 16

 

Number of post-treatment eGFR assessments

Mean (SD)

6 (2.2)

 

4 (1.6)

 

Median

6

 

4

 

Q1, Q3

5, 7

 

4, 4

 

Min, Max

2, 13

 

1, 13

 

Number of on-treatment TKV assessments

Mean (SD)

 

3 (0.3)

 

3 (1.6)

Median

 

3

 

3

Q1, Q3

 

3, 3

 

3, 3

Min, Max

 

3, 4

 

1, 7

Number of post-treatment TKV assessments

Mean (SD)

 

2 (0.4)

 

1 (0.6)

Median

 

2

 

1

Q1, Q3

 

2, 2

 

1, 2

Min, Max

 

2, 3

 

1, 3

  1. eGFR estimated glomerular filtration rate, Max maximum, Min minimum, Q1 first quartile, Q3 third quartile, SD standard deviation, TKV total kidney volume
  2. aAverage daily dose was calculated as the total actual dose divided by the duration of treatment
  3. bPercentages were calculated using the number of subjects who discontinued treatment early as the denominator