Table 1

Incidence rates per 1000 person years of all new episodes of all skin diseases combined in general practice in 1987 and 2001.

1987

2001

Incidence Rates

95% Confidence Intervals

Incidence Rates

95% Confidence Intervals

P-value

Age Categories

< 1 year

352.1

321.0 – 385.5

460.8

441.0 – 481.3

<0.001

1–4 years

328.9

312.2 – 346.2

320.0

311.8 – 328.3

0.35

5 – 9 years

340.3

325.4 – 355.7

273.7

267.1 – 280.5

<0.001

10 – 14 years

276.2

262.8 – 290.1

235.3

229.1 – 241.6

<0.001

15 – 17 years

319.0

302.5 – 336.3

266.9

258.3 – 275.7

<0.001

Gender

Male

315.9

305.5 – 326.5

279.2

274.2 – 284.3

<0.001

Female

319.0

308.3 – 330.0

296.2

290.8 – 301.5

<0.002

Urbanization

< 30,000

307.8

295.3 – 320.6

324.3

318.4 – 330.4

0.02

30,000 – 50,000

315.4

303.1 – 328.1

253.9

246.0 – 261.9

<0.001

> 50,000

349.9

332.6 – 367.9

258.1

251.9 – 264.3

<0.001

Big Cities

289.1

265.5 – 314.2

285.8

271.7 – 300.5

0.82

Region

Northern

303.3

281.8 – 326.0

253.6

244.6 – 262.8

<0.001

Central

310.2

301.0 – 319.6

282.4

277.6 – 287.3

<0.001

Southern

342.7

327.1 – 358.8

314.6

307.4 – 321.8

0.001

Season

Winter

305.8

290.4 – 321.8

279.4

272.2 – 286.8

0.003

Spring

336.6

322.5 – 351.1

294.5

287.1 – 302.1

<0.001

Summer

319.3

302.9 – 336.4

292.5

285.1 – 300.0

0.004

Autumn

304.9

291.1 – 319.2

272.7

265.8 – 279.8

<0.001

SES

Class I

305.0

289.3 – 321.2

265.2

258.6 – 271.9

<0.001

Class II

325.2

304.1 – 347.4

278.8

270.8 – 287.0

<0.001

Class III

264.2

232.2 – 299.4

299.0

284.4 – 314.0

0.06

Class IV

340.9

322.1 – 360.6

299.5

283.6 – 316.1

0.001

Class V

336.4

315.8 – 358.0

283.2

270.4 – 296.5

<0.001

Ethnicity

Natives – Western Immigrants

315.7

308.1 – 323.5

275.1

270.7 – 279.6

<0.001

Non-Western Immigrants

346.1

313.6 – 380.9

295.6

281.6 – 310.0

0.01

Total

317.4

309.9 – 325.0

287.5

283.8 – 291.2

<0.001

Mohammedamin et al. BMC Dermatology 2006 6:4   doi:10.1186/1471-5945-6-4