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Table 6 Sample statistics of the hair counts from 4 Fitzpatrick skin types of the complete data ( n= 48)

From: “Cold” X5 Hairlaser™ used to treat male androgenic alopecia and hair growth: an uncontrolled pilot study

Sample statistics Baseline Week 4 Week 8 Week 14 Week 20 Week 26
(a) Fitzpatrick skin type I (n = 6)
Minimum 22.0 37.0 31.0 21.0 26.0 11.0
25% Percentile 37.8 51.3 46.0 33.8 29.8 24.5
Median 119.0 119.0 131.0 124.5 133.5 139.5
75% Percentile 197.0 213.8 199.8 217.0 203.8 242.3
Maximum 227.0 279.0 256.0 250.0 269.0 264.0
Mean 119.50 133.70 130.20 127.30 129.20 136.30
Standard deviation 83.47 94.21 87.43 94.15 96.38 107.30
Standard error 34.08 38.46 35.69 38.44 39.35 43.82
95% Confidence interval (31.9, 207.1) (34.8, 232.5) (38.4, 221.9) (28.5, 226.1) (28.0, 230.3) (23.7, 249.0)
(b) Fitzpatrick skin type II (n = 13)
Minimum 26.0 89.0 33.0 63.0 74.0 64.0
25% Percentile 104.5 116.5 101.5 120.0 121.0 109.0
Median 150.0 180.0 156.0 185.0 157.0 163.0
75% Percentile 192.0 196.0 185.5 223.0 200.5 213.5
Maximum 297.0 302.0 329.0 335.0 308.0 313.0
Mean 150.30 166.50 155.20 179.60 166.70 164.90
Standard deviation 72.79 56.90 71.08 70.25 62.89 69.72
Standard error 20.19 15.78 19.71 19.49 17.44 19.34
95% Confidence interval (106.3, 194.3) (132.2, 200.9) (112.2, 198.1) (137.2, 222.1) (128.7, 204.7) (122.8, 207.1)
(c) Fitzpatrick skin type III (n = 15)
Minimum 48.0 51.0 42.0 77.0 52.0 75.0
25% Percentile 138.0 144.0 137.0 149.0 143.0 133.0
Median 166.0 167.0 166.0 177.0 168.0 163.0
75% Percentile 214.0 211.0 217.0 226.0 224.0 226.0
Maximum 280.0 274.0 309.0 314.0 304.0 320.0
Mean 167.70 172.00 172.20 182.10 173.40 177.80
Standard deviation 62.89 59.82 67.89 64.64 67.00 71.35
Standard error 16.24 15.45 17.53 16.69 17.30 18.42
95% Confidence interval (132.8, 202.5) (138.9, 205.1) (134.6, 209.8) (146.3, 217.9) (136.3, 210.5) (138.3, 217.3)
(d) Fitzpatrick skin type IV (n = 14)
Minimum 128.0 142.0 130.0 156.0 140.0 153.0
25% Percentile 163.0 160.0 155.5 179.5 171.5 179.3
Median 185.5 197.0 211.5 200.0 196.0 211.0
75% Percentile 225.8 244.8 269.0 265.5 256.0 244.8
Maximum 269.0 268.0 286.0 292.0 311.0 321.0
Mean 191.20 202.60 211.40 218.40 208.20 216.10
Standard deviation 42.61 43.48 55.40 49.19 51.44 48.74
Standard error 11.39 11.62 14.81 13.15 13.75 13.03
95% Confidence interval (166.6, 215.8) (177.5, 227.7) (179.4, 243.4) (190.0, 246.8) (178.5, 237.9) (187.9, 244.2)