Læknablaðið - 15.12.1989, Blaðsíða 9

LÆKNABLAÐIÐ
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Table I. Observed and expected number of deaths, standardized mortality ratio (SMR) and 95% confidence
limits among 603 fertilizer workers.
95% confidence limits
Causes of death (ICD, 7th revision) Observed deaths Expected deaths SMR Lower Upper
All causes (001-E985) .. 70 81.40 86 67 109
Malignant neoplasms (140-205) .. 17 18.59 91 53 146
-of stomach (151) 4 4.32 93 25 237
-of large intestine (152, 153) 2 1.25 160 19 578
-of rectum (154) 1 0.61 164 4 913
-of pancreas (157) 3 1.31 229 47 669
-of trachea, bronchus and lung (162, 163) 4 2.88 139 38 356
Other neoplasms 3 8.47 35 7 104
Cerebrovascular diseases (330-334) 5 7.08 71 23 165
Ischemic heart disease (420) .. 29 28.06 103 69 148
Respiratory diseases (470-527) 2 5.62 36 4 129
Accidents, poisonings and violence (E800-E985) .. .. 13 9.98 130 69 223
All other causes 4 12.07 33 *) 9 85
*) p<0.05, two-tailed.
Table II. Observed (O) and expected number of deaths (E) and standardized mortality ratio (SMR) according
to time when hired.
Time when employed (calendar years)
1954-1963 1964-1973 1974-1985
(n=206) (n=145) (n=252)
Cause of death (ICD 7th) O E SMR O E SMR O E SMR
All causes.......................... 51 56.26 91 18 21.58 83 1 3.56 28
Malignant neoplasms ................ 14 12.76 110 3 5.07 59 0 0.75 -
Ischemic heart disease.............. 21 19.26 109 8 7.71 104 0 1.09 -
Table III. Observed (O) and expected number of deaths (E) and standardized mortality ratio (SMR) according
to tasks and in the total cohort among those who had worked longer than one year.
Shift work operators Unskilled workers Others All
(n=160) (n=191) (n=70) (n=421)
Cause of death (ICD 7th) O E SMR O E SMR O E SMR O E SMR
Allcauses....................... 34 37.78 90 15 25.04 60 *) 5 11.22 45 54 74.03 73 *)
Malignant neoplasms ............ 10 9.01 111 2 5.80 34 0 2.28 - 12 17.10 70
Ischemic heart disease...... 17 13.57 125 6 8.83 68 3 3.66 82 26 26.06 100
*) p<0.05, two-tailed.
Table IV. Observed (O) and expected number of deaths (E) and standardized mortality ratio (SMR) by
duration of employment as operator.
Duration of employment (years)
0-1 2-5 6-15 >=16 all
(n=51) (n=47) (n=46) (n=67) (n=211)
Causes of death (ICD 7th) O E SMR O E SMR O E SMR O E SMR O E SMR
Allcauses........................ 9 4.74 190 8 4.53 177 11 12.48 88 15 20.77 72 43 42.51 101
Malignant neoplasms ............. 4 0.97 412 *) 2 0.99 202 5 2.93 171 3 5.09 59 14 9.98 140
Ischemic heart disease........... 1 1.30 77 4 1.47 272 6 4.48 134 7 7.62 92 18 14.87 121
‘) p<0.05. two-tailed.