Table 5 Estimated survival and median survival in serviceable physical condition

Unguja

 % surviving in serviceable condition (95% CI)

93.9 (89.6–96.4)

75.8 (67.1–82.2)

55.2 (46.2–63.9)

 Median survival in years

  Estimated from Fig. 4

3.3

3.1

2.9

  Calculated from last two data points (95% CI)

–

–

2.9 (2.5–3.3)

Pemba

 % surviving in serviceable condition (95% CI)

86.1 (78.7–91.2)

67.0 (60.6–72.6)

51.0 (44.5–57.4)

 Median survival in years

  Estimated from Fig. 4

2.3

2.6

2.7

  Calculated from last two data points (95% CI)

–

–

2.7 (2.5–3.0)